A drain valve inner member that is easy to install and remove

Abstract

This utility model relates to the design of main valve components, specifically an easy-to-install and disassemble steam trap internals, including a valve stem, a cover, a valve disc, and a valve seat. The lower end of the valve stem extends into the cover and connects to the valve disc. The lower end of the inner wall of the cover has at least two inwardly extending bosses, with adjacent bosses spaced apart and forming a notch between them. The valve seat has a first shaft section and a second shaft section from top to bottom. The upper outer periphery of the first shaft section has at least two bosses, and the longitudinal distance between each boss and the second shaft section is greater than the height of the boss. Adjacent bosses are spaced apart and forming a notch between them. After the bosses pass longitudinally through the corresponding notch, they are rotated so that the bosses are located between the bosses and the second shaft section, with the bosses at least partially overlapping longitudinally. This utility model assembles the valve seat, valve disc, cover, and valve stem together, facilitating the later maintenance and replacement of the steam trap internals.

Description

Technical Field

[0001] This utility model relates to the design of main valve components, specifically a drain valve internal component that is easy to install and disassemble. Background Technology

[0002] When condensate is generated in steam pipelines during operation, it needs to be discharged through steam traps to ensure steam quality and normal pipeline operation. In power plant steam systems, especially in high-temperature and high-pressure pipelines such as main steam pipelines, steam traps must withstand the high pressure difference and high flow velocity between the steam pipeline and the condensate drain pipeline. Cavitation cavitation is prone to occur on the sealing surface of the steam traps, resulting in a short valve service life.

[0003] As a result, various manufacturers have designed and developed steam traps with replaceable valve seats and steam traps with added throttling covers to extend the service life of valves. However, existing replaceable valve seat steam traps generally adopt a separate design of the cover and valve seat. The packing and cover are pressed together by the packing gland, and then the bottom gasket of the valve seat is pressed together to achieve a seal. The valve seat needs to be installed or removed separately, which increases the difficulty of installing and removing the internal components of the steam trap.

[0004] Based on this, this application proposes a drain valve internal component that is easy to install and disassemble. Utility Model Content

[0005] The purpose of this utility model is to provide a steam trap internal component that is easy to install and disassemble. Through the rotating connection structure design of the valve seat and valve cage, the valve seat, valve disc, cover and valve stem are assembled together. It has the characteristics of simple installation and convenient disassembly, which is conducive to the installation of steam trap internal components and subsequent maintenance. It solves the problem of difficult valve seat installation and disassembly due to the compact valve structure and small valve body cavity.

[0006] To solve the above-mentioned technical problems, this utility model provides an easy-to-install and disassemble drain valve internal component, including a valve stem, a cover, a valve disc, and a valve seat. The lower end of the valve stem extends into the cover and is connected to the valve disc. The lower end of the inner wall of the cover has at least two inwardly extending bosses. Adjacent bosses are spaced apart and a notch is formed between them. The valve seat has a first shaft segment and a second shaft segment from top to bottom. The outer diameter of the first shaft segment is smaller than the outer diameter of the second shaft segment. The upper outer periphery of the first shaft segment has at least two bosses, and the longitudinal distance between each boss and the second shaft segment is greater than the height of the boss. The bosses correspond one-to-one with the bosses. Adjacent bosses are spaced apart and a notch is formed between them.

[0007] After the second protrusion passes longitudinally through the corresponding first notch, it is rotated so that the first protrusion is located between the second protrusion and the second shaft segment. The first protrusion and the second protrusion overlap at least partially in the longitudinal direction, and the second shaft segment abuts against the cover.

[0008] Furthermore, the inner hole of the enclosure has a hole segment one and a hole segment two arranged sequentially from bottom to top. The inner diameter of the hole segment one is larger than the inner diameter of the hole segment two, and the boss one is disposed on the hole wall of the hole segment one.

[0009] Furthermore, the inner hole of the enclosure has three hole segments arranged sequentially from bottom to top: hole segment one, hole segment two, and hole segment three. The inner diameter of hole segment one is larger than the inner diameter of hole segment two, and the inner diameter of hole segment two is larger than the inner diameter of hole segment three. The boss one is disposed on the hole wall of hole segment one.

[0010] Furthermore, the cross-sections of both the first boss and the second boss are annular fan-shaped.

[0011] Furthermore, the lower end of the outer circle of the valve seat is provided with a step, and the outer side of the step and the valve body form an installation groove for installing a sealing gasket.

[0012] Furthermore, the upper inner hole of the enclosure is guided to the valve stem, and the middle inner hole is guided to the valve disc.

[0013] Furthermore, several flow holes are provided on the lower outer wall of the enclosure.

[0014] Furthermore, several of the flow holes are distributed circumferentially along the enclosure.

[0015] Furthermore, the first boss is evenly spaced along the circumference of the enclosure, and the second boss is evenly spaced along the circumference of the valve seat.

[0016] The beneficial effects of this utility model are:

[0017] This invention achieves a connection between the valve seat and the cover by having the second boss of the valve seat longitudinally pass through the corresponding notch one on the cover, and then rotating it so that the first boss is located between the second boss and the second shaft segment. The first boss and the second boss overlap at least partially in the longitudinal direction, thus assembling the valve stem, cover, valve disc and valve seat together. This facilitates the installation and subsequent maintenance of the steam trap internals, and features simple installation and convenient disassembly. The entire set of steam trap internals can be directly removed through the valve stem, reducing maintenance costs and improving installation and disassembly efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, 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.

[0019] Figure 1 This is a structural diagram of the internal components of the drain valve of this utility model, which is easy to install and disassemble;

[0020] Figure 2 This is a structural diagram of the enclosure of the drain valve internals of this utility model, which is easy to install and disassemble;

[0021] Figure 3 yes Figure 2 A bottom view;

[0022] Figure 4 yes Figure 3 A sectional view;

[0023] Figure 5 This is a structural diagram of the valve seat of the easy-to-install and disassemble internal components of the steam trap of this utility model;

[0024] Figure 6 yes Figure 5 Side view;

[0025] In the diagram: 1-valve stem, 2-cover, 3-valve disc, 4-valve seat, 22-boss one, 23-notch one, 24-flow hole, 42-boss two, 43-notch two, 44-step. Detailed Implementation

[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In one specific embodiment of this utility model, such as Figure 1-6As shown, an easy-to-install and disassemble steam trap internals include a valve stem 1, a cover 2, a valve disc 3, and a valve seat 4. The lower end of the valve stem 1 extends into the cover 2 and is connected to the valve disc 3. The lower end of the inner wall of the cover 2 has at least two inwardly extending bosses 22. Adjacent bosses 22 are spaced apart and a notch 23 is formed between them. The valve seat 4 has a first shaft section and a second shaft section from top to bottom. The outer diameter of the first shaft section is smaller than the outer diameter of the second shaft section. At least two bosses 42 are provided on the outer periphery of the upper end of the first shaft section. The longitudinal distance between each boss 42 and the second shaft section is greater than the height of the boss 22. The bosses 42 correspond one-to-one with the bosses 22. Adjacent bosses 42 are spaced apart and a notch 43 is formed between them.

[0028] After the second boss 42 passes through the corresponding notch 23 longitudinally, it is rotated so that the first boss 22 is located between the second boss 42 and the second shaft segment. The first boss 22 and the second boss 42 overlap at least partially in the longitudinal direction, and the second shaft segment abuts against the cover 2.

[0029] This invention achieves a connection between the valve seat and the cover by having the second boss of the valve seat longitudinally pass through the corresponding notch one on the cover, and then rotating it so that the first boss is located between the second boss and the second shaft segment. The first boss and the second boss overlap at least partially in the longitudinal direction, thus assembling the valve stem, cover, valve disc and valve seat together. This facilitates the installation and subsequent maintenance of the steam trap internals, and features simple installation and convenient disassembly. The entire set of steam trap internals can be directly removed through the valve stem, reducing maintenance costs and improving installation and disassembly efficiency.

[0030] like Figure 4 As shown, in this embodiment, the inner hole of the cover 2 has three hole segments arranged sequentially from bottom to top: hole segment one, hole segment two, and hole segment three. The inner diameter of hole segment one is larger than the inner diameter of hole segment two, and the inner diameter of hole segment two is larger than the inner diameter of hole segment three. Boss one 22 is provided on the hole wall of hole segment one. In this embodiment, 21 in the figure corresponds to hole segment one.

[0031] Here, the inner diameter of the first hole section is larger than the outer diameter of the second boss 42. During assembly: the second boss 42 of the valve seat 4 passes longitudinally through the notch 23 on the corresponding cover 2 and enters the first hole section. By rotating, the first boss 22 is positioned between the second boss 42 and the second shaft section. The first boss 22 and the second boss 42 overlap longitudinally to achieve the connection between the valve seat 4 and the cover 2.

[0032] Of course, in other embodiments, the inner hole of the cover 2 can be designed with other structures. For example, the inner hole of the cover 2 has a hole segment one and a hole segment two arranged sequentially from bottom to top. The inner diameter of the hole segment one is larger than the inner diameter of the hole segment two. The boss 22 is arranged on the hole wall of the hole segment one (this structure is not shown).

[0033] Specifically, such as Figure 3 and Figure 5In this embodiment, the cross-sections of both boss 22 and boss 42 are annular fan-shaped, and the outer diameter of boss 22 is larger than the inner diameter of boss 42. Here, boss 22 is evenly spaced along the circumference of the cover 2, and boss 42 is evenly spaced along the circumference of the valve seat 4. In this embodiment, the number of boss 22 and boss 42 is set to two and they are symmetrically arranged. Of course, in other embodiments, the number can be adjusted according to the requirements.

[0034] Furthermore, in this embodiment, the lower end of the outer circle of the valve seat 4 is provided with a step 44, such as... Figure 6 As shown, the outer side of step 44 forms a mounting groove between itself and the valve body for installing a sealing gasket; this design improves the sealing performance between the valve seat and the valve body.

[0035] In this embodiment, the upper inner hole of the cover 2 is guided and matched with the valve stem 1, and the middle inner hole is guided and matched with the valve disc 3; a plurality of flow holes 24 are provided on the lower outer wall of the cover 2.

[0036] Specifically, such as Figure 4 As shown, several flow holes 24 are distributed circumferentially along the cover 2.

[0037] This utility model assembles the valve seat, valve disc, cover and valve stem together, which reduces the difficulty of separate installation and disassembly of the valve seat. It features simple installation and convenient disassembly. The entire set of steam trap internals can be directly removed through the valve stem, which reduces maintenance costs, improves disassembly efficiency and facilitates the later maintenance and replacement of steam trap internals.

[0038] Specifically, during assembly, the valve stem 1 and valve disc 3 are first installed inside the cover 2. Then, the second boss 42 of the valve seat 4 is placed at the corresponding notch 23 at the lower end of the cover 2, so that the second boss 42 of the valve seat 4 passes longitudinally through the corresponding notch 23 on the cover 2. By rotating, the first boss 22 is positioned between the second boss 42 and the second shaft segment. The first boss 22 and the second boss 42 overlap at least partially in the longitudinal direction to connect the valve seat 4 and the cover 2, preventing the valve seat 4 from falling off and forming a valve core assembly. Finally, the gasket, valve core assembly, packing and other parts are installed inside the valve body to complete the assembly.

[0039] During maintenance and disassembly, simply loosen the packing bolts, remove the packing gland, and lift the valve stem 1 to easily remove the entire valve core assembly from the valve body. Then, rotate the valve seat 4 to offset the second boss of the valve seat from the first boss of the cover, so that the second boss can be disengaged from the notch 1. Then, remove the valve disc and valve stem for maintenance and replacement.

[0040] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A hydronic valve trim that is easy to install and remove, characterized in that, The valve includes a valve stem (1), a cover (2), a valve disc (3), and a valve seat (4). The lower end of the valve stem (1) extends into the cover (2) and is connected to the valve disc (3). The lower end of the inner wall of the cover (2) has at least two inwardly extending bosses (22). Two adjacent bosses (22) are spaced apart and a notch (23) is formed between them. The valve seat (4) has a first shaft section and a second shaft section from top to bottom. The outer diameter of the first shaft section is smaller than the outer diameter of the second shaft section. At least two bosses (42) are provided on the outer periphery of the upper end of the first shaft section. The longitudinal distance between each boss (42) and the second shaft section is greater than the height of the boss (22). The bosses (42) are arranged one-to-one with the bosses (22). Two adjacent bosses (42) are spaced apart and a notch (43) is formed between them. After the second protrusion (42) passes through the corresponding first notch (23) longitudinally, the first protrusion (22) is rotated to be located between the second protrusion (42) and the second shaft segment. The first protrusion (22) and the second protrusion (42) overlap at least partially in the longitudinal direction, and the second shaft segment abuts against the cover (2).

2. A drain valve trim according to claim 1, wherein, The inner hole of the enclosure (2) has a hole segment one and a hole segment two arranged sequentially from bottom to top. The inner diameter of the hole segment one is larger than the inner diameter of the hole segment two. The boss one (22) is arranged on the hole wall of the hole segment one.

3. The steam trap internal component as described in claim 1, characterized in that, The inner hole of the enclosure (2) has three hole segments arranged sequentially from bottom to top: hole segment one, hole segment two, and hole segment three. The inner diameter of hole segment one is larger than the inner diameter of hole segment two, and the inner diameter of hole segment two is larger than the inner diameter of hole segment three. The boss one (22) is disposed on the hole wall of hole segment one.

4. The steam trap internal component as described in claim 1, characterized in that, Both the first boss (22) and the second boss (42) have annular fan-shaped cross sections.

5. The steam trap internal component according to claim 1, characterized in that, The lower end of the outer circle of the valve seat (4) is provided with a step (44), and the outer side of the step (44) and the valve body form an installation groove for installing a sealing gasket.

6. The steam trap internal component according to claim 1, characterized in that, The upper inner hole of the cover (2) is guided and engaged with the valve stem (1), and the middle inner hole is guided and engaged with the valve disc (3).

7. The steam trap internal component according to claim 1, characterized in that, Several flow holes (24) are provided on the lower outer wall of the enclosure (2).

8. The drain valve internal component that is easy to install and disassemble according to claim 7, characterized in that, Several of the flow holes (24) are distributed circumferentially along the enclosure (2).

9. The drain valve internal component that is easy to install and disassemble according to claim 4, characterized in that, The first boss (22) is equally spaced along the circumference of the cover (2), and the second boss (42) is equally spaced along the circumference of the valve seat (4).

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