Triangular drain valve

Abstract

The utility model belongs to the field of drain valves, and relates to a triangular drain valve which comprises an upper cover and a lower cover, an air inlet is formed in the middle of the upper cover and communicated with a steam pipeline, a water outlet is formed in the middle of the lower cover and communicated to the outside of the drain valve, a mounting cavity is formed between the upper cover and the lower cover, and a metal liquid bag is mounted in the mounting cavity. A compression spring is arranged above the metal liquid bag, the upper end of the compression spring abuts against the upper inner wall of the installation cavity, the lower end of the compression spring abuts against the upper end of the upper shell, the compression spring always exerts downward extrusion force on the metal liquid bag, the metal liquid bag of the device is of a three-layer structure, and the support plays a role in limiting the elastic steel sheet to protect the elastic steel sheet. And the metal liquid bag is buffered through the compression spring.

Description

Technical Field

[0001] The invention belongs to the field of steam traps and relates to a triangular steam trap. Technical Background

[0002] The steam trap is also called an automatic drain or condensate drain. It is installed on the steam-heated pipeline and can automatically drain condensate. The disc-shaped metal liquid capsule is used as the switch of the steam trap, which plays a role of high-temperature sealing and draining condensate.

[0003] The metal liquid bag in the traditional steam trap has only two structures: the upper cover and the elastic steel sheet. It is unstable in operation under high temperature and high pressure. The elastic steel sheet shrinks and expands and deforms over a long period of time, and the elastic steel sheet and the upper cover are prone to cracks and damage. Summary of the invention

[0004] In view of the above problems, the present invention provides a triangular steam trap, in which the metal liquid bag adopts a three-layer structure, and the bracket plays a limiting role on the elastic steel sheet to protect the elastic steel sheet, and the compression spring plays a buffering role on the metal liquid bag.

[0005] The object of the present invention is achieved in that:

[0006] A triangular steam trap comprises an upper cover and a lower cover, wherein an air inlet is formed in the middle of the upper cover, and the air inlet is connected to a steam pipe, and a drain port is formed in the middle of the lower cover, and the drain port is connected to the outside of the steam trap, and an installation cavity is formed between the upper cover and the lower cover, and a metal liquid bag is installed in the installation cavity, wherein the metal liquid bag comprises an upper shell, an elastic steel sheet and a bracket which are arranged in sequence from top to bottom, and a closed space is formed between the upper shell and the elastic steel sheet, and a temperature-sensitive solution is arranged in the closed space, and a sealing bead is provided at the lower end of the middle part of the elastic steel sheet corresponding to the drain port, and the elastic steel sheet expands and deforms when the temperature-sensitive solution is heated, so that the sealing bead on the elastic steel sheet deforms and protrudes toward the drain port and presses against the drain port, and the bracket separates the unexpanded sealing bead from the drain port to form a drainage gap, and a drainage groove is formed on the bracket; a compression spring is provided above the metal liquid bag, and the upper end of the compression spring presses against the upper inner wall of the installation cavity, and the lower end of the compression spring presses against the upper end of the upper shell, and the compression spring always applies a force to squeeze the metal liquid bag downward.

[0007] Through the above arrangement, when the hot steam in the steam pipe enters the installation cavity of the triangular steam trap through the air inlet of the upper cover, the hot steam heats up the temperature-sensitive solution, vaporizes and expands, and the elastic steel sheet expands downward, bends and deforms, causing the sealing beads to move downward to block the drain port and seal to prevent steam from overflowing. Since hot steam will condense condensed water when it passes through the pipeline for a long time, when the condensed water in the installation cavity of the triangular steam trap accumulates to a certain extent, the temperature-sensitive solution in the metal liquid bag is cooled, liquefied and shrunk, and the elastic steel sheet is reset to cause the sealing beads to move upward and away from the drain port. The reset sealing beads are separated from the drain port by a drainage gap through the bracket, thereby discharging the condensed water. After the condensed water is discharged, the hot steam heats up and expands the metal liquid bag again, and the sealing beads press against the drain port, and this cycle repeats. During this process, the compression spring always presses against the upper end of the metal liquid bag, pressing the metal liquid bag downward so that the metal liquid bag can always be at the lower end of the installation cavity. Since the deformation of the elastic steel sheet is difficult to control, if the deformation of the elastic steel sheet is too large and the sealing bead moves downward too far, the compression spring can also play a buffering role. The sealing bead lifts the metal liquid bag a certain distance. After the elastic steel sheet is reset, the compression spring presses the metal liquid bag back to its original position, so that the bracket presses against the lower inner wall of the installation cavity.

[0008] By setting the bracket, the elastic steel sheet can be protected and limited, the deformation of the elastic steel sheet can be limited to prevent the elastic steel sheet from excessive deformation, and the unexpanded sealing bead can be separated from the drain outlet by a drainage gap.

[0009] The utility model is further configured as follows: a sealing ring is arranged between the upper cover and the lower cover.

[0010] The utility model is further configured as follows: the upper shell is circular, the periphery of the upper shell is arranged to be inclined downward, and the middle part of the upper shell protrudes upward to form a convex part.

[0011] Through the above arrangement: firstly, the volume of the enclosed space is increased, and secondly, the contact area between the upper shell and the steam is increased, thereby making the temperature sensing effect better and the response more sensitive and rapid.

[0012] The utility model is further configured as follows: the compression spring is sleeved on the raised portion of the upper shell.

[0013] The utility model is further configured as follows: the compression spring is a frustum structure with a larger upper portion and a smaller lower portion, the radius of the upper end portion of the compression spring is the same as the radius of the installation cavity, the upper end portion of the compression spring is against the angle between the upper inner wall and the side wall of the installation cavity, the radius of the lower end portion of the compression spring is equal to the radius of the bottom of the raised portion, and the lower end portion of the compression spring is sleeved on the raised portion of the upper shell.

[0014] Through the above arrangement, the compression spring can be limited, and the compression spring will not slide or shake during use, which greatly increases the stability of the compression spring during use.

[0015] The utility model is further configured as follows: the middle portion of the bracket is tilted downward relative to the elastic steel sheet to form a deformation limiting tilt angle.

[0016] Through the above arrangement, the bracket can limit the deformation of the elastic steel sheet, thereby preventing the elastic steel sheet from excessive deformation.

[0017] The utility model is further configured as follows: when the temperature-sensitive solution is preheated and expanded, the elastic steel sheet is deformed and bulged toward the bracket, the sealing beads on the elastic steel sheet extend from the drainage hole, and the elastic steel sheet fits the bracket.

[0018] Because the contact area of ​​the water outlet of the steam trap is small, if the direct contact pressure is high, the deformed elastic steel sheet is now fitted with the bracket, which not only avoids direct contact between the elastic steel sheet and the water outlet of the steam trap, but also increases the contact area between the elastic steel sheet and the bracket, thereby reducing the pressure.

[0019] The utility model is further configured as follows: a plurality of heat dissipation holes are formed on the bracket.

[0020] The heat dissipation and cooling of the metal liquid capsule can be accelerated by setting the heat dissipation holes.

[0021] The utility model is further configured as follows: a plurality of limiting holes are formed on the bracket, a plurality of limiting protrusions are formed on the elastic steel sheet, and the limiting protrusions and the limiting holes are arranged in a one-to-one correspondence.

[0022] By setting the limiting protrusion and the limiting hole, the elastic steel sheet can be limited when deformed and the radial force it is subjected to can be shared, thus playing a protective role.

[0023] The utility model is further configured as follows: the temperature sensing solution is a mixed liquid of alcohol and silicone oil.

[0024] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects: by setting the compression spring, since the deformation of the elastic steel sheet is difficult to control, if the deformation of the elastic steel sheet is too large and the sealing bead moves down too far, the compression spring can play a buffering role, and the sealing bead lifts the metal sac a little distance. After the elastic steel sheet is reset, the compression spring presses the metal sac back to its original position. By setting the bracket, the deformation of the elastic steel sheet can be limited to prevent the elastic steel sheet from being excessively deformed, and a drainage gap can be separated between the unexpanded sealing bead and the drain outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the triangular steam trap.

[0027] Figure 2 This is one of the structural explosion diagrams of the triangular steam trap.

[0028] Figure 3 This is the second structural explosion diagram of the triangular steam trap.

[0029] Figure 4 Schematic diagram of the structure of the metal liquid capsule.

[0030] Figure 5 Schematic diagram of the interior of the metal sac during drainage.

[0031] Figure 6 Schematic diagram of the interior of the metal liquid capsule when sealed.

[0032] Figure 7 This is a schematic diagram of the structure of the metal liquid capsule in Example 2

[0033] 1-upper cover; 2-lower cover; 3-air inlet; 4-drain outlet; 5-sealing ring; 6-metal liquid bag; 7-upper shell; 8-elastic steel sheet; 9-bracket; 10-temperature sensing solution; 11-sealing bead; 12-drain groove; 13-compression spring; 14-protrusion; 15-deformation limit inclination angle; 16-heat dissipation hole; 18-limiting hole; 19-limiting protrusion. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] A triangular steam trap, comprising an upper cover 1 and a lower cover 2, an air inlet 3 is formed in the middle of the upper cover 1, the air inlet 3 is connected to a steam pipe, a drain port 4 is formed in the middle of the lower cover 2, the drain port 4 is connected to the outside of the steam trap, a sealing ring 5 is provided between the upper cover 1 and the lower cover 2, an installation cavity is formed between the upper cover 1 and the lower cover 2, a metal liquid capsule 6 is installed in the installation cavity, the metal liquid capsule 6 comprises an upper shell 7, an elastic steel sheet 8 and a bracket 9 arranged in sequence from top to bottom, a closed space is formed between the upper shell 7 and the elastic steel sheet 8, a temperature-sensitive solution 10 is provided in the closed space, the middle of the elastic steel sheet 8 A sealing bead 11 is provided at the lower end corresponding to the drain outlet. The elastic steel sheet 8 expands and deforms when the temperature-sensitive solution 10 is heated, so that the sealing bead 11 on the elastic steel sheet 8 is deformed and bulges toward the drain outlet 4 and presses against the drain outlet 4. The bracket 9 separates the unexpanded sealing bead 11 and the drain outlet 4 to form a drainage gap, and a drainage groove 12 is formed on the bracket; a compression spring 13 is provided above the metal liquid bag 6, and the upper end of the compression spring 13 presses against the inner wall of the installation cavity, and the lower end of the compression spring 13 presses against the upper end of the upper shell 7. The compression spring 13 always gives the metal liquid bag 6 a downward squeezing force.

[0037] Through the setting of the compression spring 13, since the deformation of the elastic steel sheet 8 is difficult to control, if the elastic steel sheet 8 is deformed too much and the sealing bead moves down too far, the compression spring 13 can also play a buffering role. The sealing bead 11 lifts the metal liquid bag 6 a little distance. After the elastic steel sheet 8 is reset, the compression spring 13 presses the metal liquid bag 6 back to its original position, so that the bracket 9 rests against the lower inner wall of the installation cavity.

[0038] By setting the bracket 9, the elastic steel sheet 8 can be protected and limited, the deformation of the elastic steel sheet 8 can be limited to prevent the elastic steel sheet 8 from excessive deformation, and the unexpanded sealing bead 11 can be separated from the drain outlet 4 by a drainage gap.

[0039] The upper shell 7 is circular, the periphery of the upper shell 7 is tilted downward, and the middle part of the upper shell protrudes upward to form a convex portion 14. Through the above arrangement: first, the volume of the enclosed space in the metal liquid bag is increased, and second, the contact area between the upper shell 7 and the steam is increased, so that the temperature sensing effect is better and the reaction is more sensitive and rapid.

[0040] The compression spring 13 is a frustum structure with a large upper portion and a small lower portion. The radius of the upper end of the compression spring 13 is the same as the radius of the installation cavity. The upper end of the compression spring 13 abuts against the angle between the upper inner wall and the side wall of the installation cavity. The radius of the lower end of the compression spring 13 is equal to the radius of the bottom of the protrusion 14. The lower end of the compression spring 13 is sleeved on the protrusion 14 of the upper shell. Through the above arrangement, the compression spring 13 can be limited, and the compression spring will not slide or shake during use, which greatly increases the stability of the compression spring 13 during use.

[0041] The middle part of the bracket 9 is tilted downward relative to the elastic steel sheet 8 to form a deformation limiting tilt angle 15. Through the above arrangement, the bracket plays a limiting role in the deformation of the elastic steel sheet, preventing the elastic steel sheet from excessive deformation.

[0042] When the temperature-sensitive solution 10 is preheated and expanded, the elastic steel sheet 8 is deformed and bulged toward the bracket 9, and the sealing bead 11 on the elastic steel sheet 8 extends toward the drain port 4, and the elastic steel sheet 8 fits with the bracket 9. Because the water outlet of the steam trap has a small contact area, if the direct contact pressure is large, now the deformed elastic steel sheet fits with the bracket, which not only avoids direct contact between the elastic steel sheet and the steam trap water outlet, but also increases the contact area between the elastic steel sheet and the bracket, thereby reducing the pressure.

[0043] The bracket 9 is formed with a plurality of heat dissipation holes 16. The heat dissipation holes 16 can accelerate the heat dissipation and cooling of the metal molten bag.

[0044] The temperature sensing solution is a mixed liquid of alcohol and silicone oil.

[0045] Embodiment 2:

[0046] This embodiment is basically the same as the first embodiment, except that: a plurality of limiting holes 18 are formed on the bracket 9, and a plurality of limiting protrusions 19 are formed on the elastic steel sheet 8, and the limiting protrusions 19 and the limiting holes 18 are arranged one by one. By setting the limiting protrusions and the limiting holes, the elastic steel sheet can be limited when deformed, and the radial force it receives can be shared, thereby playing a protective role.

[0047] Working principle:

[0048] When the hot steam in the steam pipe enters the installation cavity of the triangular steam trap through the air inlet 3 of the upper cover 1, the hot steam heats up the temperature-sensitive solution 10, vaporizes and expands, and the elastic steel sheet 8 expands downward, bends and deforms, causing the sealing bead 11 to move downward to block the drain port 4 to seal and prevent steam from overflowing. Since hot steam will condense condensed water when it passes through the pipeline for a long time, when the condensed water in the installation cavity of the triangular steam trap accumulates to a certain extent, the temperature-sensitive solution 10 in the metal liquid bag 6 is cooled, liquefied and shrunk, and the elastic steel sheet 8 is reset to cause the sealing bead 11 to move upward and leave the drain port 4. The reset sealing bead 11 is separated from the drain port 4 by the bracket 9 to form a drainage gap, thereby discharging the condensed water. After the condensed water is discharged, the hot steam heats up and expands the metal liquid bag 6 again, and the sealing bead 11 presses against the drain port 4, and this cycle repeats. During this process, the compression spring 13 always presses against the upper end of the metal sac 6, pressing the metal sac 6 downward so that the metal sac 6 can always be at the lower end of the installation cavity. Since the deformation of the elastic steel sheet 13 is difficult to control, if the deformation of the elastic steel sheet 13 is too large and the sealing bead 11 moves downward too far, the compression spring 13 can also play a buffering role. The sealing bead 11 lifts the metal sac 6 a little distance. After the elastic steel sheet 8 is reset, the compression spring 13 presses the metal sac 6 back to its original position, so that the bracket 9 presses against the lower inner wall of the installation cavity.

[0049] The metal liquid bag of the present invention adopts a three-layer structure, has the advantages of limiting the elastic steel sheet through the bracket to protect the elastic steel sheet, and having a buffering effect on the metal liquid bag through the compression spring.

[0050] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A triangular steam trap, comprising an upper cover and a lower cover, wherein an air inlet is formed in the middle of the upper cover, the air inlet is connected to a steam pipe, and a drain port is formed in the middle of the lower cover, the drain port is connected to the outside of the steam trap, characterized in that: An installation cavity is formed between the upper cover and the lower cover, and a metal liquid bag is installed in the installation cavity. The metal liquid bag includes an upper shell, an elastic steel sheet and a bracket from top to bottom. A closed space is formed between the upper shell and the elastic steel sheet, and a temperature-sensitive solution is arranged in the closed space. A sealing bead is arranged at the lower end of the middle part of the elastic steel sheet corresponding to the drain outlet. The elastic steel sheet expands and deforms when the temperature-sensitive solution is heated, so that the sealing bead on the elastic steel sheet deforms and protrudes toward the drain outlet and presses against the drain outlet. The bracket separates the unexpanded sealing bead from the drain outlet to form a drainage gap, and a drainage groove is formed on the bracket. A compression spring is arranged above the metal liquid bag, and the upper end of the compression spring presses against the upper inner wall of the installation cavity, and the lower end of the compression spring presses against the upper end of the upper shell. The compression spring always gives the metal liquid bag a downward squeezing force.

2. A triangular steam trap according to claim 1, characterized in that: A sealing ring is arranged between the upper cover and the lower cover.

3. The triangular steam trap according to claim 1, characterized in that: The upper shell is circular, the periphery of the upper shell is tilted downward, and the middle part of the upper shell protrudes upward to form a convex part.

4. A triangular steam trap according to claim 3, characterized in that: The compression spring is sleeved on the raised portion of the upper shell.

5. A triangular steam trap according to claim 4, characterized in that: The compression spring is a frustum structure with a larger upper portion and a smaller lower portion. The radius of the upper end of the compression spring is the same as the radius of the installation cavity. The upper end of the compression spring is against the angle between the upper inner wall and the side wall of the installation cavity. The radius of the lower end of the compression spring is equal to the radius of the bottom of the raised portion. The lower end of the compression spring is sleeved on the raised portion of the upper shell.

6. The triangular steam trap according to claim 1, characterized in that: The middle portion of the bracket is tilted downward relative to the elastic steel sheet to form a deformation limiting tilt angle.

7. The triangular steam trap according to claim 1, characterized in that: When the temperature-sensitive solution is preheated and expanded, the elastic steel sheet is deformed and bulged toward the bracket, and the sealing beads on the elastic steel sheet extend toward the drain port, so that the elastic steel sheet fits the bracket.

8. The triangular steam trap according to claim 1, characterized in that: A plurality of heat dissipation holes are formed on the bracket.

9. The triangular steam trap according to claim 1, characterized in that: The bracket is formed with a plurality of limiting holes, and the elastic steel sheet is formed with a plurality of limiting protrusions, and the limiting protrusions and the limiting holes are arranged in a one-to-one correspondence.

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