A recirculation valve for a water pump

Abstract

This utility model relates to the field of valve technology, and in particular to a recirculation valve for a water pump, comprising a valve body, a valve component, an indicator part one, a sealing part, and an indicator part two. The valve body includes a valve tube, the right side of which is connected to a circulation pipe. A valve seat is fixedly connected to the inner side of the valve tube and located above the circulation pipe. A track one is provided on the right side of the valve tube and located above the valve seat. A flow seat is fixedly connected to the inner side of the circulation pipe, and a track two is provided on the upper side of the circulation pipe and located to the right of the flow seat. The valve component is installed on the inner side of the valve tube, and the valve component includes a guide frame one fixed to the inner side of the valve tube. In this utility model, the valve component, sealing part, indicator part one, and indicator part two, etc., enable the recirculation valve for the water pump to achieve intuitive visualization of the water flow path through mechanical linkage, allowing operators to monitor the status of each passage in real time without disassembling the valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a recirculation valve for a water pump. Background Technology

[0002] The recirculation valve (also known as the minimum flow valve) for the feedwater pump is a key protective device installed on the feedwater pump outlet pipeline. Its function is to automatically open during the boiler low load or start-up phase, returning a portion of the high-pressure feedwater to the deaerator to ensure that the pump maintains a minimum safe flow rate and prevent vaporization, cavitation, and overheating damage caused by insufficient flow. When the feedwater demand returns to normal, the valve closes to avoid energy waste, thus balancing pump safety and system operating economy.

[0003] The existing feedwater pump recirculation valve adopts a multi-pass structure design, but the valve body is closed, making the internal water flow path invisible. This makes it difficult for operators to intuitively judge the actual flow status of each passage, and therefore difficult to quickly identify abnormalities such as blockages. After long-term operation, undetected local blockages will further trigger a chain of failures. Therefore, in view of the above problems, a recirculation valve for feedwater pumps is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a recirculation valve for a water pump, so as to solve the problem that existing recirculation valves for water pumps are difficult to intuitively judge the actual flow status of each passage, and therefore difficult to quickly identify abnormal situations such as blockage.

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

[0006] A recirculation valve for a water pump includes a valve body, a valve component, an indicator part one, a sealing part, and an indicator part two. The valve body includes a valve pipe, the right side of which is connected to a circulation pipe. A valve seat is fixedly connected to the inner side of the valve pipe and located above the circulation pipe. A track one is provided on the right side of the valve pipe and located above the valve seat. A flow passage seat is fixedly connected to the inner side of the circulation pipe. A track two is provided on the upper side of the circulation pipe and located to the right of the flow passage seat. The valve component is installed on the inner side of the valve pipe. The valve component includes a guide frame one fixed to the inner side of the valve pipe. A slidable guide frame one is provided on the inner side of the guide frame one. A guide rod is provided, with a limit block fixedly connected to its upper end and a valve core fixedly connected to its lower end, which fits against the upper surface of the valve seat. A spring is sleeved on the outer side of the guide rod and located below the guide frame. A connecting rod is fixedly connected to the lower side of the valve core, and a guide post is fixedly connected to the lower end of the connecting rod. An indicator part is installed at one end of the track, including an indicator element that is slidably connected to the track. An arc baffle is fixedly connected to the left end of the indicator element, and a kit sleeved on the outer side of the guide rod is fixedly connected to the left side of the arc baffle. A sealing part is provided at the guide post.

[0007] Preferably, the sealing part includes a guide frame two fixed inside the circulation pipe, and the guide frame two is located on the left side of the flow seat. A connecting rod is slidably connected to the inner side of the guide frame two. A guide block that fits against the inclined surface of the guide post is fixedly connected to the left end of the connecting rod. A sealing block is fixedly connected to the right end of the connecting rod. A spring two sleeved on the outside of the connecting rod is provided between the right end face of the guide block and the left end face of the guide frame two. A gap is provided between the sealing block and the flow seat. An indicator part two located on the right side of the flow seat is installed inside the circulation pipe.

[0008] Preferably, the second indicator includes a base frame fixed inside the circulation pipe, a third spring fixedly connected to the left side of the base frame, a sliding column fixedly connected to the left side of the third spring and slidably connected to the inner wall of the circulation pipe, a plurality of transversely through-holes opened on the inner side of the sliding column, and an second indicator fixedly connected to the upper side of the sliding column and slidably connected to the second track.

[0009] Preferably, the spring is disposed on the upper side of the kit, the arc of the arc baffle is set to the same size as the arc of the inner curved surface of the valve tube, the right curved surface of the arc baffle is in contact with the inner curved surface of the valve tube, and the height of the arc baffle is twice the height of the track.

[0010] Preferably, the diameter of the sliding column is the same as the inner diameter of the circulation pipe, the outer curved surface of the sliding column fits into the inner curved surface of the circulation pipe, the sliding column is composed of a left conical part and a right column part, and the length of the second track is 0.4 times the length of the right column part of the sliding column.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the valve part, the sealing part, the first indicator part, and the second indicator part are designed to automatically control the opening and closing of the valve pipe and the circulation pipe according to the changes in water flow. The first indicator part and the second indicator part can move and indicate the position as the valve pipe and the circulation pipe are opened. This enables the water flow path of the recirculation valve for the water pump to be visualized intuitively through mechanical linkage. This allows the operator to monitor the status of each passage in real time without disassembling the valve. This solves the problem that existing recirculation valves for water pumps are difficult to intuitively judge the actual flow status of each passage, and therefore difficult to quickly identify abnormal conditions such as blockages. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This utility model Figure 1 A schematic diagram of the cross-sectional structure;

[0015] Figure 3This is a cross-sectional view of the valve housing of this utility model.

[0016] Figure 4 This is a structural schematic diagram of the valve part of this utility model;

[0017] Figure 5 This is a schematic diagram of the sealing part of this utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the second indicator part of this utility model.

[0019] In the diagram: 1. Valve housing; 11. Valve pipe; 12. Circulation pipe; 13. Valve seat; 14. Rail 1; 15. Flow seat; 16. Rail 2; 2. Valve assembly; 21. Guide frame 1; 22. Guide rod; 23. Limiting block; 24. Valve core; 25. Spring 1; 26. Connecting rod; 27. Guide post; 3. Indicator 1; 31. Kit; 32. Arc baffle; 33. Indicator 1; 4. Sealing part; 41. Guide frame 2; 42. Connecting rod; 43. Guide block; 44. Sealing block; 45. Spring 2; 5. Indicator 2; 51. Base frame; 52. Spring 3; 53. Sliding column; 54. Flow hole; 55. Indicator 2. Detailed Implementation

[0020] 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.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0023] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0026] Please see Figure 1-6This utility model provides a technical solution:

[0027] A recirculation valve for a water pump includes a valve housing 1, a valve component 2, an indicator 3, a sealing part 4, and an indicator 5. The valve housing 1 includes a valve pipe 11, with a circulation pipe 12 connected to the right side of the valve pipe 11. A valve seat 13 is fixedly connected to the inner side of the valve pipe 11 and located above the circulation pipe 12. A track 14 is provided on the right side of the valve pipe 11 and located above the valve seat 13. A flow seat 15 is fixedly connected to the inner side of the circulation pipe 12, and a track 2 16 is provided on the upper side of the circulation pipe 12 and located to the right of the flow seat 15. The valve component 2 is installed on the inner side of the valve pipe 11. The valve component 2 includes a guide bracket 21 fixed to the inner side of the valve pipe 11, and a sliding connection is provided on the inner side of the guide bracket 21. A guide rod 22 has a limit block 23 fixedly connected to its upper end, and a valve core 24 that fits against the upper surface of the valve seat 13 is fixedly connected to its lower end. A spring 25 located under the guide frame 21 is sleeved on the outside of the guide rod 22. A connecting rod 26 is fixedly connected to the lower side of the valve core 24, and a guide post 27 is fixedly connected to the lower end of the connecting rod 26. An indicator part 3 is installed at the rail 14. The indicator part 3 includes an indicator element 33 that is slidably connected to the rail 14. An arc baffle 32 is fixedly connected to the left end of the indicator element 33. A kit 31 sleeved on the outside of the guide rod 22 is fixedly connected to the left side of the arc baffle 32. A sealing part 4 is provided at the guide post 27.

[0028] The sealing part 4 includes a guide frame 41 fixed inside the circulation pipe 12, and the guide frame 41 is located on the left side of the flow seat 15. A connecting rod 42 is slidably connected to the inner side of the guide frame 41. A guide block 43 that fits against the inclined surface of the guide post 27 is fixedly connected to the left end of the connecting rod 42. A sealing block 44 is fixedly connected to the right end of the connecting rod 42. A spring 45 sleeved on the outside of the connecting rod 42 is provided between the right end face of the guide block 43 and the left end face of the guide frame 41. A gap is provided between the sealing block 44 and the flow seat 15. An indicator part 2 5 is installed on the inner side of the circulation pipe 12, located to the right of the flow seat 15. The sealing part 4, after activation, can seal the flow seat 15. The indicator part 2 5 includes a base frame 51 fixed to the inner side of the circulation pipe 12. A spring 3 52 is fixedly connected to the left side of the base frame 51. A sliding column 53, slidably connected to the inner wall of the circulation pipe 12, is fixedly connected to the left side of the spring 3 52. Several transversely penetrating flow holes 54 are opened on the inner side of the sliding column 53. An indicator 55 is fixedly connected to the upper side of the assembly and slidably connected to the second track 16. The indicator 55 indicates the water flow in the circulation pipe 12. A spring 25 is set on the upper side of the assembly 31. The spring 25 can reset the valve core 24 and the assembly 31. The arc of the arc baffle 32 is the same size as the arc of the inner curved surface of the valve pipe 11. The right curved surface of the arc baffle 32 fits against the inner curved surface of the valve pipe 11. The height of the arc baffle 32 is... The height of the track 14 is twice that of the track 14. This design ensures that the arc baffle 32 can always seal the track 14. The diameter of the sliding column 53 is the same as the inner diameter of the circulation pipe 12. The outer curved surface of the sliding column 53 fits into the inner curved surface of the circulation pipe 12. The sliding column 53 consists of a left conical part and a right column part. The length of the track 2 16 is 0.4 times the length of the right column part of the sliding column 53. This design ensures that the sliding column 53 can always seal the track 2 16.

[0029] Workflow: The water flow path indication operation of the recirculation valve for the water pump is as follows: When water enters the water pump from the lower inlet of valve pipe 11, if the flow rate is small and the pressure is insufficient to push the valve core 24 upward, the position of the valve core 24 and valve seat 13 keeps valve pipe 11 closed. At this time, the water flow is forced to change course and enter the circulation pipe 12. The water flow passes through the flow seat 15 and multiple flow holes 54 of the sliding member 53 in sequence. During the water flow, the sliding member 53 will be pushed to the right, thereby driving the indicator 55 on the right side to move synchronously. By observing the movement of the indicator 55, the operator can confirm that the current water flow is returning to the water pump along the path of circulation pipe 12. When the water flow rate increases to a level sufficient to overcome the resistance of spring 25, the high-pressure water flow pushes the valve core 24 upward, causing the valve core 24 to separate from the valve seat 13, and the valve pipe 11 channel opens. At this time, the water flow mainly flows along... The flow path is upward through valve pipe 11, and the upward movement of valve core 24 is linked by guide post 27, guide block 43, and connecting rod 42, driving sealing block 44 to move to the right to close flow seat 15, automatically cutting off the path of circulation pipe 12. At the same time, valve core 24 drives indicator 1 33 to move upward through kit 31 and arc baffle 32. At this time, the operator can confirm that the water flow path has been switched to valve pipe 11 by the displacement of indicator 1 33. Combining the difference in displacement amplitude between indicator 1 33 and indicator 2 55, the actual water flow rate can be further judged. This realizes the intuitive visualization of water flow path through mechanical linkage of the recirculation valve for water pump, allowing the operator to monitor the status of each passage in real time without disassembling the valve. This solves the problem that the existing recirculation valve for water pump is difficult to intuitively judge the actual flow status of each passage, and therefore it is difficult to quickly identify abnormalities such as blockage.

[0030] 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 recirculation valve for a water pump, comprising a valve housing (1), a valve component (2), an indicator part one (3), a sealing part (4), and an indicator part two (5), characterized in that: The valve housing (1) includes a valve tube (11), a circulation pipe (12) is connected to the right side of the valve tube (11), a valve seat (13) is fixedly connected to the inner side of the valve tube (11) and located above the circulation pipe (12), a first track (14) is provided on the right side of the valve tube (11) and located above the valve seat (13), a flow seat (15) is fixedly connected to the inner side of the circulation pipe (12), a second track (16) is provided on the upper side of the circulation pipe (12) and located to the right of the flow seat (15), a valve component (2) is installed on the inner side of the valve tube (11), the valve component (2) includes a first guide frame (21) fixed to the inner side of the valve tube (11), a guide rod (22) is slidably connected to the inner side of the first guide frame (21), and a limiter is fixedly connected to the upper end of the guide rod (22). Block (23), the lower end of the guide rod (22) is fixedly connected to a valve core (24) that fits against the upper end face of the valve seat (13), the outer side of the guide rod (22) is fitted with a spring (25) located under the guide frame (21), the lower side of the valve core (24) is fixedly connected to a connecting rod (26), the lower end of the connecting rod (26) is fixedly connected to a guide post (27), an indicator part (3) is installed at the track (14), the indicator part (3) includes an indicator element (33) that is slidably connected to the track (14), the left end of the indicator element (33) is fixedly connected to an arc baffle (32), the left side of the arc baffle (32) is fixedly connected to a kit (31) fitted on the outside of the guide rod (22), and a sealing part (4) is provided at the guide post (27).

2. A recirculation valve for a water pump according to claim 1, characterized in that: The sealing part (4) includes a guide frame two (41) fixed inside the circulation pipe (12), and the guide frame two (41) is located on the left side of the flow seat (15). A connecting rod (42) is slidably connected to the inside of the guide frame two (41). A guide block (43) that fits against the inclined surface of the guide post (27) is fixedly connected to the left end of the connecting rod (42). A sealing block (44) is fixedly connected to the right end of the connecting rod (42). A spring two (45) sleeved on the outside of the connecting rod (42) is provided between the right end face of the guide block (43) and the left end face of the guide frame two (41). A gap is provided between the sealing block (44) and the flow seat (15). An indicator part two (5) located on the right side of the flow seat (15) is installed inside the circulation pipe (12).

3. A recirculation valve for a water pump according to claim 2, characterized in that: The second indicator (5) includes a base frame (51) fixed inside the circulation pipe (12). A third spring (52) is fixedly connected to the left side of the base frame (51). A sliding column (53) that is slidably connected to the inner wall of the circulation pipe (12) is fixedly connected to the left side of the third spring (52). A plurality of transversely through holes (54) are opened on the inner side of the sliding column (53). An indicator (55) that is slidably connected to the second track (16) is fixedly connected to the upper side of the sliding column (53).

4. A recirculation valve for a water pump according to claim 3, characterized in that: The spring (25) is set on the upper side of the kit (31). The arc of the arc baffle (32) is set to the same size as the arc of the inner curved surface of the valve tube (11). The right curved surface of the arc baffle (32) is in contact with the inner curved surface of the valve tube (11). The height of the arc baffle (32) is twice the height of the track (14).

5. A recirculation valve for a water pump as set forth in claim 3, characterized in that: The diameter of the sliding column (53) is the same as the inner diameter of the circulation pipe (12). The outer curved surface of the sliding column (53) fits into the inner curved surface of the circulation pipe (12). The sliding column (53) is composed of a left cone and a right column. The length of the second track (16) is 0.4 times the length of the right column of the sliding column (53).

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