A multifunctional pressure switch

Abstract

This utility model discloses a multifunctional pressure switch, comprising: a valve body, an intermediate body, and a valve cover. The valve body is provided with an inlet and multiple outlets; the intermediate body is provided with a valve core, and sealing elements are installed at the top and bottom of the valve core; the valve cover is provided with an air inlet. In this utility model, the end of the metal valve core is threadedly connected to the sealing elements by screws. The sealing elements can correspondingly control the sealing cavity formed between the intermediate body, the valve body, and the valve cover, thereby controlling the flow channel opening and closing and adjusting the opening degree. It is suitable for long-term high-frequency pressure fluctuation environments and effectively improves service life. The area difference between the valve core and the sealing diaphragm can form a high sealing specific pressure, so that even a small gas pressure can drive the valve core to move. It is suitable for small flow and high-precision control scenarios. When compressed air is injected, the valve opening degree can be linearly adjusted, thereby adapting to the dynamic pressure requirements of frequency conversion systems.

Description

Technical Field

[0001] This utility model relates to the field of pressure switch technology, specifically to a multifunctional pressure switch. Background Technology

[0002] Air conditioning, refrigeration, and heating systems all require the installation of multi-functional pressure switch valves. These valves monitor system pressure changes in real time and automatically trigger control mechanisms to achieve precise system pressure balance. When the system pressure exceeds or falls below a set threshold, the pressure switch will promptly activate or deactivate relevant equipment, effectively preventing flow fluctuations caused by pressure imbalances and avoiding overload operation of core components such as compressors and water pumps due to abnormal pressure. This protects the stable operation of the system while optimizing equipment efficiency, achieving energy conservation and consumption reduction.

[0003] Existing multi-functional pressure switches use a single pressure threshold setting mechanism, which is difficult to dynamically adapt to frequency conversion systems. Frequency conversion systems rely on real-time adjustment of equipment operating frequency to match load changes, while the setting of a single pressure threshold lacks flexibility and cannot make accurate responses to dynamic changes in system operating conditions. When the system is running at low load, the fixed threshold of the pressure switch may cause hydraulic imbalance, resulting in uneven fluid distribution in the pipeline and causing local pressure to be too high or too low. In scenarios with frequent load fluctuations, a single threshold will cause frequent pump start-stops, which not only accelerates the wear of pump mechanical parts and shortens equipment life, but may also cause loosening of pipe joints and aging of seals, further affecting the stability and reliability of the entire system, increasing maintenance costs and failure risks. Utility Model Content

[0004] The purpose of this utility model is to provide a multifunctional pressure switch in order to solve the above problems.

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

[0006] The valve body is equipped with an inlet and multiple outlets to provide a flow path for the medium.

[0007] The intermediate body is provided with a valve core, and the top and bottom of the valve core are equipped with seals for controlling the flow channel opening and closing and adjusting the opening degree;

[0008] The valve cover has an air inlet to provide a flow path for compressed air.

[0009] As a further description of the above technical solution, a flow cavity is provided inside the valve body, and the flow cavity is connected to the liquid inlet, the first outlet and the second outlet respectively.

[0010] As a further description of the above technical solution, the liquid inlet is located on one side of the valve body, and the liquid inlet is connected to one side of the flow cavity.

[0011] As a further description of the above technical solution, the first outlet is located on the other side of the valve body and is connected to the other side of the flow cavity; the second outlet is located at the bottom of the valve body and is connected to the bottom of the flow cavity.

[0012] As a further description of the above technical solution, the top of the valve body and the intermediate body abut against each other to form a first sealing cavity, and the first sealing cavity controls the opening and closing of the flow cavity through the bottom seal.

[0013] As a further description of the above technical solution, the top of the intermediate body abuts against the valve cover to form a second sealing cavity, and the second sealing cavity controls the valve core opening degree through the top seal.

[0014] As a further description of the above technical solution, a functional port is provided on one side of the intermediate body, and the functional port is connected to the second sealing cavity.

[0015] As a further description of the above technical solution, the sealing element includes a diaphragm pressure plate and a valve disc pressure plate, and the sealing element is detachably connected to the end of the valve core.

[0016] As a further description of the above technical solution, the diaphragm pressure plate is detachably mounted on the top of the valve core by screws, and the valve disc pressure plate is detachably mounted on the bottom of the valve core by screws.

[0017] As a further description of the above technical solution, the diaphragm pressure plate abuts against the sealing diaphragm, and the diameter of the sealing diaphragm is 2-4 times that of the valve core.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. In this utility model, the end of the metal valve core is connected to the sealing element by screws. The sealing element can control the sealing cavity formed between the intermediate body, the valve body and the valve cover, thereby controlling the flow channel opening and closing and adjusting the opening degree. It is suitable for long-term high-frequency pressure fluctuation environment and effectively improves service life.

[0020] 2. The area difference between the valve core and the sealing diaphragm in this utility model can form a high sealing specific pressure, so that a small gas pressure can drive the valve core to move. It is suitable for small flow and high precision control scenarios. When compressed air is injected, the valve opening can be linearly adjusted, thereby adapting to the dynamic pressure requirements of the frequency conversion system.

[0021] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a front view of the multifunctional pressure switch of this utility model;

[0023] Figure 2 This is a side view of the multifunctional pressure switch of this utility model;

[0024] Figure 3 yes Figure 2 Sectional view at point AA.

[0025] Figure label:

[0026] 1. Valve body; 11. Liquid inlet; 12. Liquid outlet; 121. First outlet; 122. Second outlet; 13. Flow chamber; 2. Intermediate body; 21. Functional port; 3. Valve core; 4. Sealing element; 41. Diaphragm pressure plate; 42. Valve disc pressure plate; 43. Sealing diaphragm; 44. Screw; 5. Valve cover; 51. Air inlet; 6. First sealing chamber; 7. Second sealing chamber. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figures 1-3 As shown, in one embodiment, a multi-functional pressure switch includes: a valve body 1, an intermediate body 2, and a valve cover 5.

[0029] The valve body 1 is provided with an inlet 11 and multiple outlets 12. The inlet 11 is used to connect the fluid medium to be controlled, and the multiple outlets 12 can be flexibly opened or closed according to the actual pipeline requirements, so as to facilitate the flow of the medium in the valve and subsequent pipeline system. The intermediate body 2 is equipped with a valve core 3. The top and bottom of the valve core 3 are equipped with seals 4, which can accurately control the opening and closing state of the internal flow channel of the valve body 1 with the displacement of the valve core 3, and can achieve fine adjustment of the opening degree of the medium flow by different displacement degrees of the valve core 3. In addition, the valve cover 5 is provided with an air inlet 51, which serves as the access channel for compressed air and provides a passage for the flow of compressed air between the valve cover 5 and the relevant control chamber.

[0030] Furthermore, the valve body 1 has a flow cavity 13 inside, and the flow cavity 13 is connected to the liquid inlet 11, the first outlet 121 and the second outlet 122 respectively.

[0031] Specifically, the inlet 11 is located on one side of the valve body 1 and is connected to one side of the flow chamber 13; the first outlet 121 is located on the other side of the valve body 1 and is connected to the other side of the flow chamber 13; the second outlet 122 is located at the bottom of the valve body 1 and is connected to the bottom of the flow chamber 13; different outlets can be flexibly selected according to the actual pipeline connection and medium flow direction requirements to adapt to various system installation and operation scenarios.

[0032] It should be explained in detail that the top of the valve body 1 and the intermediate body 2 abut against each other to form a first sealing cavity 6. The first sealing cavity 6 controls the opening and closing of the flow cavity 13 through the bottom seal 4. Correspondingly, the top of the intermediate body 2 abuts against the valve cover 5 to form a second sealing cavity 7. The second sealing cavity 7 controls the opening degree of the valve core 3 through the top seal 4.

[0033] In addition, a functional port 21 is provided on one side of the intermediate body 2, and the functional port 21 is connected to the second sealing cavity 7. It can be used as an access channel for external control signals (such as compressed air, control fluid, etc.). When the external control signal enters the second sealing cavity 7 through the functional port 21, it realizes remote switching control of the valve core 3 opening degree.

[0034] Understandably, the end of the metal valve core 3 is threadedly connected to the seal 4 via screw 44. The seal 4 can control the sealing cavity formed between the intermediate body 2, the valve body 1, and the valve cover 5. When the pressure or state of the sealing cavity changes, the seal 4 drives the valve core 3 to move, thereby controlling the flow channel opening and closing. It can also finely adjust the opening degree, thus adapting to long-term high-frequency pressure fluctuation environments and effectively improving service life.

[0035] Please continue reading. Figures 1-3 In this embodiment, the sealing element 4 includes a diaphragm pressure plate 41 and a valve disc pressure plate 42. The sealing element 4 is detachably connected to the end of the valve core 3, which facilitates later maintenance and replacement.

[0036] Furthermore, the diaphragm plate 41 is detachably mounted on the top of the valve core 3 by screws 44, while the valve disc plate 42 is detachably mounted on the bottom of the valve core 3 by screws 44.

[0037] Specifically, the diaphragm plate 41 abuts against the sealing diaphragm 43, and the diameter of the sealing diaphragm 43 is 2-4 times that of the valve core 3.

[0038] For example, the diameter of the sealing diaphragm 43 is 81 mm, while the diameter of the valve core 3 is 27 mm, which can form a sealing pressure ratio of 3:1. Based on Pascal's principle, the pressure amplification effect brought about by this area difference can give the pressure switch high sensitivity, so that even a small gas pressure can drive the valve core 3 to move, which is suitable for small flow and high precision control scenarios. Moreover, when compressed air is injected, the valve opening can be linearly adjusted, thereby adapting to the dynamic pressure requirements of the frequency conversion system.

[0039] Working principle: During operation, the medium flows into the valve body 1 from the inlet 11, and is diverted to the first outlet 121 and / or the second outlet 122 through the internal flow chamber 13. The user can choose to block one of the outlets according to actual needs, flexibly planning the medium flow direction. When it is necessary to adjust the valve opening, the compressed air introduced through the air inlet 51 acts on the diaphragm pressure plate 41 and the sealing diaphragm 43 at the top of the valve core 3. Since the diameter of the sealing diaphragm 43 (81mm) and the diameter of the valve core 3 (27mm) form a 3:1 area ratio, according to Pascal's law... The pressure of a small volume of air can be amplified into a high sealing specific pressure, which drives the valve core 3 to move. The displacement of the valve core 3 is linearly related to the inlet pressure. The higher the pressure, the greater the upward movement of the valve core 3, the larger the valve opening, and the greater the medium flow rate. Conversely, when the inlet pressure is reduced, the valve core 3 falls back under the action of gravity or spring rebound force, and the valve opening decreases. This can not only meet the on / off control requirements of small flow pipelines, but also adapt to dynamic pressure changes in frequency conversion systems, effectively avoid hydraulic imbalance or frequent pump start-stop problems, and ensure stable system operation.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional pressure switch, characterized in that, include: The valve body (1) is provided with an inlet (11) and multiple outlets (12) to provide a flow path for the medium; The intermediate body (2) is provided with a valve core (3), and the valve core (3) is equipped with seals (4) at the top and bottom for controlling the flow channel opening and closing and adjusting the opening degree; The valve cover (5) is provided with an air inlet (51) for providing a flow path for compressed air.

2. The multifunctional pressure switch according to claim 1, characterized in that, The valve body (1) has a flow chamber (13) inside, which is connected to the liquid inlet (11), the first outlet (121) and the second outlet (122) respectively.

3. The multifunctional pressure switch according to claim 2, characterized in that, The liquid inlet (11) is located on one side of the valve body (1), and the liquid inlet (11) is connected to one side of the flow chamber (13).

4. The multifunctional pressure switch according to claim 2, characterized in that, The first outlet (121) is located on the other side of the valve body (1) and is connected to the other side of the flow chamber (13). The second outlet (122) is located at the bottom of the valve body (1) and is connected to the bottom of the flow chamber (13).

5. The multifunctional pressure switch according to claim 1, characterized in that, The top of the valve body (1) and the middle body (2) abut against each other to form a first sealing cavity (6), and the first sealing cavity (6) controls the opening and closing of the flow cavity (13) through the bottom seal (4).

6. The multifunctional pressure switch according to claim 1, characterized in that, The top of the intermediate body (2) abuts against the valve cover (5) to form a second sealing cavity (7), and the second sealing cavity (7) controls the opening degree of the valve core (3) through the top seal (4).

7. The multifunctional pressure switch according to claim 1, characterized in that, The intermediate body (2) has a functional port (21) on one side, and the functional port (21) is connected to the second sealing cavity (7).

8. The multifunctional pressure switch according to claim 1, characterized in that, The sealing element (4) includes a diaphragm pressure plate (41) and a valve disc pressure plate (42), and the sealing element (4) is detachably connected to the end of the valve core (3).

9. The multifunctional pressure switch according to claim 8, characterized in that, The diaphragm plate (41) is detachably mounted on the top of the valve core (3) by screws (44), and the valve disc plate (42) is detachably mounted on the bottom of the valve core (3) by screws (44).

10. The multifunctional pressure switch according to claim 8, characterized in that, The diaphragm plate (41) abuts against the sealing diaphragm (43), and the diameter of the sealing diaphragm (43) is 2-4 times that of the valve core (3).

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