A condenser drain line check valve

Abstract

The utility model discloses a kind of condenser water drain pipeline check valve, comprising: condenser unit, including condenser body, hot well water drain pipeline being located at the lower end of condenser body;Check valve unit, including the check valve assembly for being located at the lower end opening of hot well water drain pipeline and being used for the reverse plugging of hot well water drain pipeline, support assembly for being used for the suspension of check valve assembly in the outer side of hot well water drain pipeline. The lower end outlet of hot well water drain pipeline is blocked by check valve assembly hung in the lower end of support assembly, air is prevented from entering into condenser body and destroying vacuum to cause tripping, while after the normal stop of unit, condenser body water drain work is not affected, and it is safe to use.

Description

Technical Field

[0001] This utility model relates to the field of power plant safety production technology, specifically a check valve for a condenser drain pipe. Background Technology

[0002] In the existing technology, there are only two manual valves on the condenser hot well drain pipe. When the unit is running normally, the condenser is in a high vacuum state (between -88KPa and -96KPa). If the manual valve of the condenser hot well drain pipe is accidentally opened due to human error, outside air will enter the condenser along this pipe, destroying the vacuum and causing the corresponding turbine to trip, affecting the safe production of the generator unit, and even causing economic and social reputational losses.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Utility Model Content

[0004] The purpose of this utility model is to provide a check valve for the condenser drain pipe, in order to solve the problem mentioned in the background art where the manual valve of the condenser hot well drain pipe is accidentally opened due to human error, causing outside air to enter the condenser along the pipe, destroying the vacuum, causing the corresponding turbine to trip, and affecting the safe production of the generator set.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A check valve for a condenser drain pipe, comprising:

[0007] A condenser unit includes a condenser body and a hot well drain pipe located at the lower end of the condenser body.

[0008] The check valve unit includes a check valve assembly located at the lower end of the hot well drain pipe for reverse sealing of the hot well drain pipe, and a support assembly located outside the hot well drain pipe for suspending the check valve assembly.

[0009] Furthermore, a manual valve for closing and adjusting the hot well water discharge pipe is provided inside the hot well water discharge pipe and between the condenser body and the support assembly.

[0010] Furthermore, the support component includes:

[0011] The clamp is fastened to the outside of the hot well drain pipe by bolts;

[0012] The horizontal bar is fixedly connected to one side of the clamp;

[0013] A suspension rod, fixedly connected to the lower end of the horizontal rod, is used to suspend the check valve assembly.

[0014] Furthermore, the check valve assembly includes:

[0015] A connecting rod is hinged to the lower end of the boom, and a bracket is fixedly connected to the upper end of the connecting rod and on both sides of the boom. The bracket is internally connected to a hinge shaft that is hinged to the boom.

[0016] A metal disc, fixedly connected to one end of the connecting rod, is used to seal the lower opening of the hot well water discharge pipe;

[0017] A counterweight is fixedly connected to one end of the connecting rod opposite the metal disc, and is used to cooperate with the hinge shaft to press the metal disc against the lower end of the hot well water discharge pipe.

[0018] Furthermore, a circular rubber pad is fixedly connected to the upper end of the metal disc to cooperate with the metal disc in sealing the hot well water outlet pipe.

[0019] Furthermore, the outer diameter of the circular rubber pad is larger than the outer diameter of the hot well water discharge pipe.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention uses a check valve assembly suspended at the lower end of the support component to block the lower outlet of the hot well drain pipe, preventing air from entering the condenser body and disrupting the vacuum, thus causing a shutdown. At the same time, it does not affect the condenser body's drain operation after the unit has stopped normally, ensuring safe use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the hot well water discharge pipe of this utility model;

[0024] Figure 3 This diagram shows the fit between the support assembly and the check valve assembly of this utility model.

[0025] Reference numerals: 1. Condenser unit; 11. Condenser body; 12. Hot well drain pipe; 13. Manual valve; 2. Check valve unit; 21. Support assembly; 211. Clamp; 212. Horizontal rod; 213. Hanger rod; 22. Check valve assembly; 221. Bracket; 2211. Hinge shaft; 222. Connecting rod; 223. Counterweight; 224. Metal disc; 225. Circular rubber pad. Detailed Implementation

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

[0027] Please see Figure 1-3 This utility model provides a technical solution:

[0028] A check valve for a condenser drain pipe, comprising:

[0029] Condenser unit 1 includes condenser body 11 and hot well drain pipe 12 located at the lower end of condenser body 11.

[0030] The check valve unit 2 includes a check valve assembly 22 located at the lower end opening of the hot well drain pipe 12 for reverse sealing of the hot well drain pipe 12, and a support assembly 21 located outside the hot well drain pipe 12 for suspending the check valve assembly 22.

[0031] It should be noted that if someone accidentally opens the hot well drain pipe 12 of the condenser body 11, this device can block the lower outlet of the hot well drain pipe 12 by using the check valve assembly 22 suspended at the lower end of the support assembly 21, preventing air from entering the condenser body 11 and disrupting the vacuum, thus causing the unit to trip. At the same time, after the unit stops normally, it will not affect the draining operation of the condenser body 11, ensuring safe use.

[0032] As an improvement, such as Figure 1-2 As shown, a manual valve 13 for closing and adjusting the hot well water discharge pipe 12 is provided inside the hot well water discharge pipe 12 and between the condenser body 11 and the support assembly 21.

[0033] Furthermore, the support component 21 includes:

[0034] Clamp 211 is fastened to the outside of the hot well drain pipe 12 by bolts;

[0035] The horizontal bar 212 is fixedly connected to one side of the clamp 211;

[0036] The boom 213 is fixedly connected to the lower end of the horizontal rod 212 and is used to suspend the check valve assembly 22.

[0037] Furthermore, such as Figure 2-3 As shown, the check valve assembly 22 includes:

[0038] The connecting rod 222 is hinged to the lower end of the lifting rod 213. The upper end of the connecting rod 222 and the two sides of the lifting rod 213 are fixedly connected to the bracket 221. The bracket 221 is internally connected to the hinge shaft 2211 which is hinged to the lifting rod 213.

[0039] A metal disc 224 is fixedly connected to one end of the connecting rod 222 and is used to seal the lower opening of the hot well water discharge pipe 12.

[0040] The counterweight 223 is fixedly connected to one end of the connecting rod 222 relative to the metal disc 224, and is used to cooperate with the hinge shaft 2211 to press the metal disc 224 against the lower end of the hot well water discharge pipe 12.

[0041] The upper end of the metal disc 224 is fixedly connected to a circular rubber pad 225, which is used to cooperate with the metal disc 224 to seal the hot well water discharge pipe 12.

[0042] In addition, such as Figure 1-2 As shown, the outer diameter of the circular rubber pad 225 is larger than the outer diameter of the hot well water discharge pipe 12.

[0043] It should be noted that: in the specific implementation process of this utility model, if... Figure 1-2 As shown, when the manual valve 13 of the pipeline is in the closed state, the metal disc 224 is kept horizontal under the action of the counterweight 223, and the circular rubber pad 225 is kept in contact with the outlet edge of the hot well water discharge pipeline 12.

[0044] like Figure 1-3 As shown, when the unit is running, the condenser body 11 is under negative pressure. If someone accidentally opens the manual valve 13, the hot well drain pipe 12 above the circular rubber pad 225 is connected to the inside of the condenser body 11 and is under negative pressure. Meanwhile, the bottom of the metal disc 224 is connected to the outside atmosphere. Under the action of the pressure difference, the bottom of the metal disc 224 is subjected to a vertical upward pressure. Under this pressure, the circular rubber pad 225 is tightly fitted to the lower outlet edge of the hot well drain pipe 12. The circular rubber pad 225 at the fitting point deforms and fits more tightly to the pipe outlet edge, thereby preventing air from entering the interior of the condenser body 11, preventing vacuum failure, and ensuring the safe operation of the unit.

[0045] like Figure 2As shown, when the unit is shut down, the vacuum is broken. At this time, the inside of the condenser body 11 is connected to the outside. The pressure above the circular rubber pad 225 and below the metal disc 224 is equal. When water needs to be drained, the manual valve 13 of the pipeline is opened, and the condensate flows out from the hot well drain pipe 12. Under the pressure of the water, the metal disc 224 drives the support 221 to rotate through the connecting rod 222. The support 221 rotates relative to the hanger 213 through the hinge shaft 2211, so that the circular rubber pad 225 leaves the outlet edge of the hot well drain pipe 12. The condensate naturally falls into the condenser pit. After the condensate is drained, the check valve returns to the horizontal state.

[0046] This device is not only suitable for condenser drain pipes, but also for the discharge pipes of other negative pressure equipment, and the outlet of the discharge pipe is vertically downward.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A check valve for a condenser drain pipe, characterized in that, include: The condenser unit (1) includes a condenser body (11) and a hot well drain pipe (12) located at the lower end of the condenser body (11). The check valve unit (2) includes a check valve assembly (22) located at the lower end of the hot well drain pipe (12) for reverse sealing of the hot well drain pipe (12), and a support assembly (21) located outside the hot well drain pipe (12) for suspending the check valve assembly (22).

2. The check valve for a condenser drain pipe according to claim 1, characterized in that: The hot well drain pipe (12) is provided with a manual valve (13) for closing and adjusting the hot well drain pipe (12) inside and between the condenser body (11) and the support assembly (21).

3. A check valve for a condenser drain pipe according to claim 1, characterized in that: The support component (21) includes: The clamp (211) is fastened to the outside of the hot well drain pipe (12) by bolts; A horizontal bar (212) is fixedly connected to one side of the clamp (211); The boom (213) is fixedly connected to the lower end of the horizontal rod (212) and is used to suspend the check valve assembly (22).

4. A check valve for a condenser drain pipe according to claim 3, characterized in that: The check valve assembly (22) includes: A connecting rod (222) is hinged to the lower end of the boom (213). A bracket (221) is fixedly connected to the upper end of the connecting rod (222) and on both sides of the boom (213). A hinge shaft (2211) that is hinged to the boom (213) is connected inside the bracket (221). A metal disc (224) is fixedly connected to one end of the transverse rod (212) and is used to seal the lower opening of the hot well water discharge pipe (12). A counterweight (223) is fixedly connected to one end of the connecting rod (222) relative to the metal disc (224) and is used to cooperate with the hinge shaft (2211) to press the metal disc (224) against the lower end of the hot well water discharge pipe (12).

5. A check valve for a condenser drain pipe according to claim 4, characterized in that: A circular rubber pad (225) is fixedly connected to the upper end of the metal disc (224) to cooperate with the metal disc (224) to seal the hot well water discharge pipe (12).

6. A check valve for a condenser drain pipe according to claim 5, characterized in that: The outer diameter of the circular rubber pad (225) is larger than the outer diameter of the hot well water discharge pipe (12).

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