Pressure switch for controlling air pressure to be constant

Abstract

The utility model discloses a pressure switch for controlling constant air pressure, which relates to the technical field of pressure switches and comprises a switch body, the right side of the switch body is fixedly connected with a connecting port, the side surface of the connecting port is fixedly connected with a circular ring, and the side surface of the circular ring is provided with an arc-shaped groove. And four connecting rods are movably inserted into the arc-shaped groove, and sealing pieces are fixedly connected to the front ends of the four connecting rods. The round cover drives the four connecting rods to move into the arc-shaped grooves, the round cover drives the four connecting rods to rotate, so that the round cover is tightly attached to the connecting opening through the threaded grooves, the four T-shaped rods are pulled outwards, the tension spring is stretched, the connecting rods move into the through grooves, the T-shaped rods are loosened, and the connecting opening is closed. And the vertical rod of the T-shaped rod is moved into the fixing groove through the rebound force of the tension spring, so that after the pressure switch is used for a long time, internal parts of the pressure switch are prevented from being loosened due to air pressure, and the pressure switch is prevented from being exploded.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure switches, in particular to a pressure switch for controlling constant air pressure. Background Art

[0002] The gas pressure switch is a simple pressure control device. When the pressure of the measured gas reaches the rated value, the gas pressure switch can send a control signal. When the measured pressure exceeds the rated value, the free end of the elastic element will be displaced, pushing the switch element directly or after comparison, changing the on-off state of the switch element to achieve the purpose of controlling the measured pressure.

[0003] The existing patent (Announcement No.: CN208444778U) discloses a gas pressure switch, including a shell, one end of which is provided with an air inlet, and the other end is provided with a pin, and the shell is provided with a diaphragm and a movable contact block for contacting the pin to achieve connection, and the diaphragm is arranged at the inner end position corresponding to the air inlet, and the compression gasket is limited by engaging the compression gasket with the limiting boss through the limiting groove, so as to avoid deflection after a certain period of use, thereby affecting the pressure on the diaphragm and avoiding the problem of air tightness. In the process of implementing this solution, it is found that the following problems exist in the prior art, which have not been well solved: the above-mentioned device reduces the deflection of the pressure switch by engaging the limiting groove with the limiting boss, but after the above-mentioned device is used for a long time, the impact force of the air pressure can easily cause its internal parts to become loose, and when the air pressure is too high, the impact force of the air pressure can easily cause its parts to explode. Utility Model Content

[0004] In order to improve the above-mentioned problem that the internal parts may become loose due to the impact force of the air pressure and the parts may explode due to the impact force of the air pressure when the air pressure is too high, the utility model provides a pressure switch for controlling the air pressure to be constant.

[0005] The utility model provides a pressure switch for controlling constant air pressure, which adopts the following technical scheme:

[0006] A pressure switch for controlling constant air pressure, comprising a switch body, a connection port fixedly connected to the right side of the switch body, a ring fixedly connected to the side of the connection port, an arc groove opened on the side of the ring, four connecting rods movably inserted in the arc groove, and sealing members fixedly connected to the front ends of the four connecting rods;

[0007] An annular groove is provided on the side of the connection port, a masonry plate is slidably connected inside the annular groove, four through grooves are provided on the side of the masonry plate, and the side of the inner wall of the through groove is slidably connected to the side of the connecting rod;

[0008] Four T-shaped rods are movably inserted on the outer side of the through slot, and a tension spring is fixedly sleeved on the side of the vertical rod of the T-shaped rod, one end of the tension spring is slidably connected to the side of the horizontal rod of the T-shaped rod, and the other end of the tension spring is fixedly connected to the side of the concentric circular plate;

[0009] A fixing groove is provided on the side of the connecting rod, and the side of the vertical rod of the T-shaped rod is slidably connected to the side of the inner wall of the fixing groove. A compression spring is fixedly sleeved on the side of the inner wall of the annular groove, and one end of the compression spring is fixedly connected to the side of the concentric circular plate. An adjustment module is fixedly connected to the inside of the switch body.

[0010] Through the above technical solution, it can be ensured that after the pressure switch is used for a long time, its internal parts will not become loose due to air pressure, the pressure switch will not explode, and the air pressure inside the pressure switch can be quickly maintained at a constant pressure.

[0011] Optionally, in the above-mentioned pressure switch for controlling constant air pressure, the sealing member includes a round cover, a side surface of the round cover is fixedly connected to the front ends of four connecting rods, and a rubber sealing ring is fixedly connected to the inside of the round cover.

[0012] Through the above technical solution, it is easy to move the rubber sealing ring to the inside of the sealing groove, thereby ensuring the overall sealing effect of the switch body.

[0013] Optionally, in the above-mentioned pressure switch for controlling constant air pressure, a threaded groove is provided on the side of the connecting port, and a sealing groove is provided on the front side of the connecting port.

[0014] Through the above technical solution, it is convenient to tighten the round cover through the threaded groove, thereby ensuring a higher fit between the round cover and the connecting port.

[0015] Optionally, in the above-mentioned pressure switch for controlling constant air pressure, the regulating module includes a regulating cylinder, a side surface of the regulating cylinder is fixedly connected to the front side of the inner wall of the switch body, one end of the telescopic rod of the regulating cylinder is fixedly connected to a sealing plate, and the rear side of the inner wall of the switch body is fixedly connected to a sensing block.

[0016] Through the above technical solution, the air pressure inside the switch body can be adjusted by adjusting the cylinder to drive the sealing plate to move.

[0017] Optionally, in the above-mentioned pressure switch for controlling constant air pressure, a command transmission block is fixedly connected to the rear side of the sensing block, and the command transmission block is electrically connected to the regulating cylinder and the sensing block respectively.

[0018] Through the above technical solution, when the sensing block senses that the air pressure inside the switch body is more or less, it sends instructions to the instruction transmission block, so that the instruction transmission block drives the adjusting cylinder to extend and retract, thereby maintaining the air pressure inside the switch body at a constant pressure.

[0019] Optionally, in the above-mentioned pressure switch for controlling constant air pressure, an air outlet is provided on the rear side of the switch body.

[0020] Through the above technical solution, the air outlet hole can be used to quickly and conveniently deflate the switch body.

[0021] Optionally, in the above-mentioned pressure switch for controlling constant air pressure, the connecting port and the air outlet are both on the same center of a circle.

[0022] Through the above technical solution, the connecting port and the air outlet are arranged on the same circle, so that the air pressure inside the switch body can quickly move to the air outlet through the connecting port.

[0023] In summary, the utility model includes at least one of the following beneficial effects: 1. The four connecting rods are driven to move into the arc groove through the round cover, and the four connecting rods are driven to rotate through the round cover, so that the round cover is tightly fitted with the connecting port through the threaded groove, and the four T-shaped rods are pulled outward to stretch the tension spring to move the connecting rod into the through groove, and the T-shaped rod is relaxed so that the vertical rod of the T-shaped rod is moved to the fixed groove by the rebound force of the tension spring, thereby ensuring that the internal parts of the pressure switch will not become loose due to air pressure after being used for a long time, and ensuring that the pressure switch will not explode.

[0024] 2. Through the induction block, the abnormal air pressure is transmitted to the command transmission block. The command transmission block sends a command to drive the telescopic rod of the regulating cylinder to drive the sealing plate to move. When the air pressure is high, the sealing plate moves forward to open the connection port for exhaust, so that the air pressure inside the pressure switch can be quickly guaranteed to be at a constant pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 2 It is a partial three-dimensional structural schematic diagram of the connection port of the utility model;

[0027] Figure 3 It is a partial three-dimensional structural cross-sectional view of the sealing element of the utility model;

[0028] Figure 4 It is a partial three-dimensional structural cross-sectional view of the switch body of the utility model.

[0029] In the figure: 1. switch body; 101. induction block; 12. air outlet; 2. connection port; 201. threaded groove; 202. sealing groove; 3. circular ring; 4. arc groove; 5. connecting rod; 6. sealing member; round cover; 602. rubber sealing ring; 7. annular groove; 8. concentric circular plate; 9. through groove; 10. T-bar; 11. tension spring; 12. compression spring; 13. fixing groove; 14. adjustment module; 1401. adjustment cylinder; 1402. sealing plate; 1403. instruction transmission block. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 The utility model is described in further detail.

[0031] Please refer to the attached figure in the instruction manual Figure 1 , Figure 2 , Figure 3 and Figure 4 The utility model provides an embodiment: a pressure switch for controlling constant air pressure, comprising a switch body 1, a connection port 2 is fixedly connected to the right side of the switch body 1, a ring 3 is fixedly connected to the side of the connection port 2, an arc groove 4 is opened on the side of the ring 3, four connecting rods 5 are movably inserted in the arc groove 4, and a sealing member 6 is fixedly connected to the front end of the four connecting rods 5;

[0032] An annular groove 7 is provided on the side of the connection port 2, a masonry plate 8 is slidably connected inside the annular groove 7, four through grooves 9 are provided on the side of the masonry plate 8, and the side of the inner wall of the through groove 9 is slidably connected to the side of the connection rod 5;

[0033] Four T-shaped rods 10 are movably inserted on the outer side of the through slot 9, and a tension spring 11 is fixedly sleeved on the side of the vertical rod of the T-shaped rod 10, one end of the tension spring 11 is slidably connected to the side of the horizontal rod of the T-shaped rod 10, and the other end of the tension spring 11 is fixedly connected to the side of the concentric circular plate 8;

[0034] A fixing groove 13 is provided on the side of the connecting rod 5. The side of the vertical rod of the T-shaped rod 10 is slidably connected to the side of the inner wall of the fixing groove 13. A compression spring 12 is fixedly sleeved on the side of the inner wall of the annular groove 7. One end of the compression spring 12 is fixedly connected to the side of the concentric circular plate 8. An adjustment module 14 is fixedly connected to the inside of the switch body 1.

[0035] See the attached drawings in the specification Figure 1 , Figure 2 , Figure 3 and Figure 4 The sealing member 6 includes a round cover 601, the side of which is fixedly connected to the front ends of the four connecting rods 5, and a rubber sealing ring 602 is fixedly connected to the inside of the round cover 601, which can be moved to the inside of the sealing groove 202 through the rubber sealing ring 602, thereby ensuring the overall sealing effect of the switch body 1.

[0036] See the attached drawings in the specification Figure 1 , Figure 2 , Figure 3 and Figure 4 A thread groove 201 is provided on the side of the connection port 2, and a sealing groove 202 is provided on the front side of the connection port 2. The thread groove 201 is used to facilitate tightening the round cover 601, thereby ensuring that the round cover 601 and the connection port 2 fit better.

[0037] See the attached drawings in the specification Figure 1 , Figure 2 , Figure 3 and Figure 4 The regulating module 14 includes a regulating cylinder 1401, the side of the regulating cylinder 1401 is fixedly connected to the front side of the inner wall of the switch body 1, one end of the telescopic rod of the regulating cylinder 1401 is fixedly connected to a sealing plate 1402, and the rear side of the inner wall of the switch body 1 is fixedly connected to the sensing block 101. The sealing plate 1402 is driven to move by the regulating cylinder 1401 to adjust the air pressure inside the switch body 1.

[0038] See the attached drawings in the specification Figure 1 , Figure 2 , Figure 3 and Figure 4 A command transmission block 1403 is fixedly connected to the rear side of the sensing block 101. The command transmission block 1403 is electrically connected to the regulating cylinder 1401 and the sensing block 101 respectively. When the sensing block 101 senses that the air pressure inside the switch body 1 is more or less, the command is sent to the command transmission block 1403, so that the command transmission block 1403 drives the regulating cylinder 1401 to expand and contract, thereby maintaining the air pressure inside the switch body 1 at a constant pressure.

[0039] See the attached drawings in the specification Figure 1 , Figure 2 , Figure 3 and Figure 4 An air outlet hole 102 is provided on the rear side of the switch body 1 , and the air outlet hole 102 is convenient for quickly deflation of the switch body 1 .

[0040] See the attached drawings in the specification Figure 1 , Figure 2 , Figure 3 and Figure 4 The connection port 2 and the air outlet 102 are on the same circle center. The connection port 2 and the air outlet 102 are on the same circle, so that the air pressure inside the switch body 1 can quickly move to the air outlet 102 through the connection port 2.

[0041] Working principle: When the pressure switch for controlling constant air pressure is used, the four connecting rods 5 are moved to the inside of the arc groove 4 through the round cover 601, and the four connecting rods 5 are rotated through the round cover 601, so that the round cover 601 is tightly fitted with the connecting port through the threaded groove 201, and the four T-shaped rods 10 are pulled outward to stretch the tension spring 11. At the same time, the connecting rod 5 is moved to the inside of the through groove 9, and then the T-shaped rod 10 is relaxed, so that the vertical rod of the T-shaped rod 10 is moved to the inside of the fixed groove 13 by the rebound force when the tension spring 11 is reset, which can ensure that the internal parts of the pressure switch will not become loose due to air pressure after being used for a long time, and ensure that the pressure switch will not explode;

[0042] When the air pressure inside the switch body 1 is high, it is sensed by the sensing block 101, and then the abnormal air pressure is transmitted to the command transmission block 1403. The command transmission block 1403 sends a command to drive the telescopic rod of the regulating cylinder 1401 to drive the sealing plate 1402 to move. When the air pressure is high, the sealing plate 1402 moves forward, so that the connecting port 2 is opened for exhaust, and the air pressure inside the pressure switch can be quickly maintained at a constant pressure.

[0043] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A pressure switch for controlling constant air pressure, comprising a switch body (1), characterized in that: The right side of the switch body (1) is fixedly connected to a connection port (2), a side of the connection port (2) is fixedly connected to a circular ring (3), a side of the circular ring (3) is provided with an arc groove (4), four connection rods (5) are movably inserted inside the arc groove (4), and the front ends of the four connection rods (5) are fixedly connected to sealing members (6); An annular groove (7) is provided on the side of the connection port (2), a concentric circular plate (8) is slidably connected inside the annular groove (7), four through grooves (9) are provided on the side of the concentric circular plate (8), and the side surfaces of the inner walls of the through grooves (9) are slidably connected to the side surfaces of the connection rod (5); Four T-shaped rods (10) are movably inserted on the outer side of the through slot (9), and a tension spring (11) is fixedly sleeved on the side of the vertical rod of the T-shaped rod (10), one end of the tension spring (11) is slidably connected to the side of the horizontal rod of the T-shaped rod (10), and the other end of the tension spring (11) is fixedly connected to the side of the concentric circular plate (8); A fixing groove (13) is provided on the side of the connecting rod (5); the side of the vertical rod of the T-shaped rod (10) is slidably connected to the side of the inner wall of the fixing groove (13); a compression spring (12) is fixedly sleeved on the side of the inner wall of the annular groove (7); one end of the compression spring (12) is fixedly connected to the side of the concentric circular plate (8); and an adjustment module (14) is fixedly connected inside the switch body (1).

2. A pressure switch for controlling constant air pressure according to claim 1, characterized in that: The sealing member (6) comprises a round cover (601), the side surface of the round cover (601) being fixedly connected to the front ends of four connecting rods (5), and the interior of the round cover (601) being fixedly connected to a rubber sealing ring (602).

3. A pressure switch for controlling constant air pressure according to claim 1, characterized in that: A thread groove (201) is provided on the side of the connection port (2), and a sealing groove (202) is provided on the front side of the connection port (2).

4. A pressure switch for controlling constant air pressure according to claim 1, characterized in that: The regulating module (14) comprises a regulating cylinder (1401), the side of the regulating cylinder (1401) being fixedly connected to the front side of the inner wall of the switch body (1), one end of the telescopic rod of the regulating cylinder (1401) being fixedly connected to a sealing plate (1402), and the rear side of the inner wall of the switch body (1) being fixedly connected to a sensing block (101).

5. A pressure switch for controlling constant air pressure according to claim 4, characterized in that: A command transmission block (1403) is fixedly connected to the rear side of the sensing block (101), and the command transmission block (1403) is electrically connected to the regulating cylinder (1401) and the sensing block (101) respectively.

6. A pressure switch for controlling constant air pressure according to claim 1, characterized in that: An air outlet hole (102) is provided on the rear side of the switch body (1).

7. A pressure switch for controlling constant air pressure according to claim 6, characterized in that: The connection port (2) and the air outlet hole (102) are located at the same center of a circle.

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