A vacuum degree regulating valve

Abstract

This application provides a vacuum regulating valve, installed on an external vacuum mechanism, comprising: a valve core with a cover connected to one end; an adjusting member sleeved on the valve core; the adjusting member being movable on the valve core and connected to the other end of an elastic member; an elastic member sleeved on the valve core, with its two ends connected to the cover and the adjusting member respectively; a valve seat disposed at the end of the adjusting member away from the elastic member, the elastic member having elasticity and capable of pressing the cover onto the valve seat, thereby sealing the cover and the valve seat; and a valve housing, wherein the inner wall of the valve seat and the outer wall of the adjusting member are both sealed to the inner wall of the valve housing, and the cover and the valve core are both located inside the valve housing; when there is a gap between the valve seat and the cover, the external vacuum mechanism communicates with the outside. This application improves the stability of the external vacuum mechanism.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically, to a vacuum regulating valve. Background Technology

[0002] Boiler feedwater systems typically employ vacuum deaeration technology, and the vacuum level within the deaerator directly affects the dissolved oxygen concentration in the feedwater. Existing systems exhibit the following key issues:

[0003] 1. The conflict between vacuum level and dissolved oxygen:

[0004] When the dissolved oxygen concentration is too high, the frequency of the vacuum pump needs to be increased to improve the vacuum level and reduce the oxygen content; however, if the vacuum level is too high, it will cause difficulties in feeding water to the boiler or even prevent water supply (because the negative pressure is too high and hinders the water flow).

[0005] 2. Limitations of manual operation:

[0006] Boiler operators need to frequently adjust the vacuum pump, but due to the time difference between the increase in vacuum and the decrease in dissolved oxygen, large fluctuations in vacuum and lag in response can easily occur, affecting the stability of the system.

[0007] 3. Imbalance between energy consumption and efficiency:

[0008] Long-term high-frequency operation of vacuum pumps increases energy consumption, and manual pressure relief is required when the vacuum level exceeds the limit to prevent boiler water supply difficulties and low water level shutdown. This operation is cumbersome and poses safety hazards. Utility Model Content

[0009] In view of this, the purpose of this application is to provide a vacuum regulating valve that can improve the problems of large vacuum fluctuations and lag response caused by frequent adjustment of the vacuum pump, which affect the stability of the system.

[0010] To achieve the above technical objectives, the technical solution adopted in this application is as follows:

[0011] This application provides a vacuum regulating valve, including:

[0012] The valve core has a cover attached to its end;

[0013] An adjusting element is sleeved on the valve core; it is connected to the other end of the elastic element, and the adjusting element is movable on the valve core.

[0014] An elastic element is sleeved on the valve core, and its two ends are respectively connected to the cover and the adjusting element;

[0015] A valve seat is disposed at the end of the adjusting member away from the elastic member. The elastic member has elasticity and can press the cover body onto the valve seat to seal between the cover body and the valve seat.

[0016] It also includes a valve housing, wherein the inner wall of the valve seat and the outer wall of the adjusting component are both sealed to the inner wall of the valve housing, and the cover and the valve core are both located inside the valve housing;

[0017] When there is a gap between the valve seat and the cover, the external vacuum mechanism is connected to the outside.

[0018] Furthermore, it also includes a connector, one end of which is sealed to the inner wall of the valve housing, and the adjusting member is located between the elastic member and the connector;

[0019] The other end of the connector is used to connect to an external vacuum mechanism.

[0020] Furthermore, the cover has a circular structure, and multiple radial protrusions are evenly arranged on the outer periphery of the cover.

[0021] Furthermore, the connector, valve seat, and adjusting component are all threadedly connected to the valve body.

[0022] Furthermore, the valve seat is provided with a sealing ring, so that when the cover is pressed against the sealing ring, the cover and the valve seat are sealed.

[0023] The invention employing the above technical solution has the following advantages:

[0024] In the technical solution provided in this application, an adjusting component is incorporated. This adjusting component is movable on the valve core, and the compression of the elastic element is adjusted via the adjusting component to regulate the preload applied to the cover, thus adapting to the vacuum requirements of the external vacuum mechanism. When the vacuum of the external vacuum mechanism is too high, the external pressure presses against the cover, causing it to move towards the adjusting component. A gap appears between the cover and the valve seat, opening the vacuum regulating valve. External air enters the external vacuum mechanism through this gap, reducing its vacuum level. When the vacuum level of the external vacuum mechanism is normal, the external pressure applied to the cover decreases, and the elastic force of the elastic element presses the cover and valve seat tightly together, preventing external air from entering the external vacuum mechanism and closing the vacuum regulating valve. This eliminates the need for manual adjustment during the operation of the external vacuum mechanism. Only before installing the vacuum regulating valve, the compression of the elastic element is adjusted via the adjusting component based on the vacuum requirements of the external vacuum mechanism. This adjustment allows for adaptation to different vacuum requirements, improving the stability of the external vacuum mechanism. Attached Figure Description

[0025] This application can be further illustrated by the non-limiting embodiments given in the accompanying drawings. It should be understood that the following drawings only illustrate some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without any inventive effort.

[0026] Figure 1 A schematic diagram of the structure (including the valve body) provided for an embodiment of this application.

[0027] Figure 2 A schematic diagram of the structure provided for an embodiment of this application (excluding the valve body).

[0028] Figure 3 Provided for the embodiments of this application Figure 1 A schematic diagram of the AA section.

[0029] Icons: 100-valve body; 200-connector; 201-first end; 202-second end; 300-valve seat; 400-valve core; 500-elastic element; 600-adjusting element; 700-cover; 800-radial protrusion; 900-sealing ring. Detailed Implementation

[0030] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Please refer to Figures 1-3 As shown, the vacuum regulating valve includes a valve body 100, a connector 200, a valve seat 300, a valve core 400, an elastic element 500, an adjusting element 600, a cover 700, and a radial protrusion 800.

[0032] The valve body 100 has internal threads.

[0033] like Figure 3 As shown, the elastic element 500 is sleeved on the valve core 400, which is axial in shape. A cover 700 is connected to the end of the valve core 400.

[0034] like Figures 1-3 As shown, it also includes a valve seat 300, which has a through hole. The end of the through hole is located at the top of the valve seat 300. The outer wall of part of the valve seat 300 has an external thread. The external thread of the valve seat 300 can be threaded with the internal thread of the valve body 100, so that the valve seat 300 can be fixed in the valve body 100. At the same time, it also plays a sealing role between the valve seat 300 and the valve body 100, so that external air can only enter the gap between the valve seat 300 and the cover body 700 through the through hole.

[0035] In this embodiment, the elastic element 500 is sleeved on the valve core 400, and the cover 700 is located between one end of the elastic element 500 and the valve seat 300. When the elastic element 500 is compressed, it tends to move the cover 700 towards the valve seat 300, thereby pressing the cover 700 against the valve seat 300. The valve seat 300 is provided with a sealing ring 900. When the cover 700 is pressed against the valve seat 300, it can compress the sealing ring 900, thereby achieving a seal between the cover 700 and the valve seat 300. In this embodiment, the cover 700 is circular, and its diameter is larger than the diameter of the through hole, so that the cover 700 can block the through hole. Therefore, when the cover 700 and the valve seat 300 are sealed, the external air is blocked by the valve seat 300.

[0036] Adjusting element 600 is sleeved on valve core 400 and connected to the other end of elastic element 500. Adjusting element 600 is movable on valve core 400. The outer wall of adjusting element 600 has external threads. The external threads of adjusting element 600 can engage with the internal threads of valve body 100, so that adjusting element 600 can adjust the compression of elastic element 500 and adjust the elastic force of elastic element 500 by changing its position on valve core 400, thereby adjusting the holding force of cover 700 on valve seat 300.

[0037] For example, the regulating member 600 has a through hole at its center, through which the valve core 400 passes, allowing the regulating member 600 to move on the valve core 400. The regulating member 600 also has several regulating holes arranged circumferentially along the through hole. By passing a tool through the regulating holes, the regulating member 600 is installed inside the valve housing 100. The regulating holes are through holes.

[0038] In this embodiment, the cover 700 and the valve core 400 are integrally formed. The outer circumferential surface of the cover 700 is uniformly provided with a number of radial protrusions 800. The gap between the radial protrusions 800 and the inner wall of the valve shell 100 is small, which is used to ensure the centering of the cover 700 and the valve core 400 within the valve shell 100.

[0039] In this embodiment, the two ends of the connector 200 have a first thread 201 and a second thread 202 respectively. The connector 200 has a through hole. The first thread 201 is used to connect with an external vacuum mechanism to install a vacuum regulating valve on the external vacuum mechanism. The external vacuum mechanism can be a deaerator.

[0040] In this embodiment, the two ends of the elastic element 500 are connected to the cover 700 and the adjusting element 600, respectively. The compression of the elastic element 500 is adjusted by moving the adjusting element 600 on the valve core 400. Based on the vacuum requirement, the compression of the elastic element 500 is adjusted by adjusting the adjusting element 600 to adjust the vacuum level when the valve is opened and closed. The adjusting element 600 is fixed by engaging the external thread of the adjusting element 600 with the internal thread of the valve body 100. Then, the vacuum regulating valve is installed on the deaerator through the connector 200.

[0041] The vacuum regulating valve proposed in this embodiment is implemented as follows: When the vacuum degree of the deaerator does not exceed the elastic force of the elastic element 500, the elastic force of the elastic element 500 drives the cover 700 to press against the sealing ring 900. At this time, the valve seat 300 and the inner wall of the valve shell 100 are sealed, and the cover 700 blocks the through hole of the valve seat 300, preventing external air from entering the deaerator. When the vacuum degree of the deaerator is too high, causing it to exceed the elastic force of the elastic element 500, the external pressure pushes the cover 700 toward the regulating element 600, causing a gap to appear between the cover 700 and the valve seat 300. External air enters the deaerator in sequence through the through hole of the valve seat 300, the gap between the valve seat 300 and the cover 700, the regulating hole and through hole of the regulating element 600, and the through hole of the connector 200, thereby reducing the vacuum degree of the deaerator. When the vacuum level of the deaerator is normal, the external pressure decreases, and the elastic element presses the cover 700 against the sealing ring 900, thereby closing the valve and maintaining the system's airtightness.

[0042] Based on the implementation methods described above, exemplarily:

[0043] When the vacuum is too high, the pressure difference ΔP on both sides of the valve body increases (ΔP = atmospheric pressure - deaerator internal pressure). The cover 700 is pushed by atmospheric pressure, overcoming the pre-tightening force of the elastic element 500 and moving to the right. The valve opens, and external air flows into the deaerator through the channel, causing the vacuum of the deaerator to decrease.

[0044] Normal operating conditions (maintaining a seal):

[0045] When the vacuum level returns to normal, ΔP decreases below the critical value, the elastic element 500 rebounds, pushing the cover 700 to press against the valve seat 300; the valve closes, and the system returns to a sealed state.

[0046] In this embodiment, the vacuum regulating valve is assembled as follows: First, based on the actual situation of the deaerator, a suitable vacuum limit is determined. Then, based on the vacuum limit, the amount of compression of the elastic element 500 is determined. Based on the amount of compression, the thickness of the cover 900, and the length of the valve housing 100, the external thread of the valve seat 300 and the relative distance between the adjusting elements 600 are determined. Then, the position where the adjusting element 600 is screwed into the valve housing 100 and the length of the external thread of the valve seat 300 screwed into the valve housing 100 are determined. Finally, the second end 202 of the connector 200 is screwed into the valve housing 100, and then the first end 201 is engaged with the deaerator thread to complete the overall installation.

[0047] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A vacuum degree regulating valve installed on an external vacuum mechanism, characterized by, The utility model relates to a valve, comprising: a valve core, the end is connected with the cover; an adjusting part, which is sleeved on the valve core and connected with the other end of the elastic part, and is movable on the valve core; an elastic part, which is sleeved on the valve core and connected with the cover and the adjusting part respectively; a valve seat, which is arranged at the end of the adjusting part away from the elastic part, and the elastic part has elastic force to press the cover on the valve seat to seal the cover and the valve seat; a valve shell, the inner wall of the valve seat and the outer wall of the adjusting part are in sealing connection with the inner wall of the valve shell, and the cover and the valve core are located in the valve shell; when there is a gap between the valve seat and the cover, the external vacuum mechanism is in communication with the outside.

2. The vacuum regulating valve according to claim 1, wherein a connecting head, one end of which is in sealing connection with the inner wall of the valve shell, and the adjusting part is located between the elastic part and the connecting head; the other end of the connecting head is used for connecting with the external vacuum mechanism.

3. The vacuum regulating valve according to claim 1, wherein The cover is circular in structure, and a plurality of radial protrusions are uniformly arranged on the outer periphery of the cover.

4. The vacuum regulating valve according to claim 2, wherein The connecting head, the valve seat and the adjusting part are in screw connection with the valve shell.

5. The vacuum regulation valve according to claim 1, wherein The valve seat is provided with a sealing ring, so that when the cover is pressed on the sealing ring, the cover and the valve seat are sealed.

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