Pressure relay

Abstract

The utility model provides a pressure relay, which comprises a pressure relay main body, a heat insulation shell arranged on the outer side of the pressure relay main body, an air inlet arranged above the left side in the heat insulation shell, an air outlet arranged below the right side in the heat insulation shell, and an air guide square tube respectively arranged at the front ends of the air inlet and the air outlet. The front end of the air guide square pipe is connected with corrugated telescopic pipes through a communicating air pipe, the front end of the left corrugated telescopic pipe is connected with an air inlet fan, the front end of the right corrugated telescopic pipe is connected with an exhaust fan, and the heat insulation shell comprises a high-temperature-resistant metal layer, a vacuum heat insulation layer and a ceramic fiber heat insulation layer. The pressure relay has the beneficial effects that the heat insulation shell is arranged, so that the heat insulation shell can effectively prevent external heat from being transmitted to the interior of the pressure relay in a high-temperature environment. And internal sensitive electronic components, mechanical structures and the like are prevented from being damaged, deformed or reduced in performance due to high temperature. And the pressure relay can still operate stably in a high-temperature environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure relays, in particular to a pressure relay. Background Art

[0002] A pressure relay is a control component that converts pressure signals into electrical signals and is widely used in hydraulic and pneumatic systems. It senses pressure changes in the system and triggers electrical contacts when the pressure reaches a set value, thereby achieving control and protection of the system.

[0003] However, current pressure relays suffer from several significant drawbacks due to their inherently poor high-temperature resistance. First, in high-temperature environments, the electronic components within the pressure relay are susceptible to heat, causing performance degradation or even damage. This can lead to inaccurate pressure signal detection, false triggering, or non-triggering of electrical contacts, thus affecting proper system control. Second, high temperatures accelerate the aging process of the pressure relay, reducing its service life.

[0004] In summary, the poor high-temperature resistance of current pressure relays seriously limits their application in high-temperature environments, and they are in urgent need of improvement and enhancement. Therefore, it is urgent to develop a pressure relay that can be used in high-temperature environments. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a pressure relay to solve the problems raised in the above background technology.

[0006] The utility model is realized by the following technical solutions: a pressure relay, comprising: a pressure relay body, a heat-insulating shell is installed on the outer side of the pressure relay body;

[0007] An air inlet is provided on the upper left side of the heat-insulating shell, and an air outlet is provided on the lower right side of the shell;

[0008] An air guide square tube is installed at the front end of the air inlet and the air outlet respectively. The front end of the air guide square tube is connected to a corrugated telescopic tube through a connecting air pipe. The front end of the corrugated telescopic tube on the left is connected to an air intake fan, and the front end of the corrugated telescopic tube on the right is connected to an exhaust fan.

[0009] As a preferred embodiment, the front side of the heat-insulating shell is connected to an heat-insulating door via a hinge.

[0010] As a preferred embodiment, the thermal insulation shell includes a high-temperature resistant metal layer, a vacuum insulation layer and a ceramic fiber insulation layer.

[0011] As a preferred embodiment, a vacuum insulation layer is provided inside the high-temperature resistant metal layer, and a ceramic fiber insulation layer is provided inside the vacuum insulation layer.

[0012] As a preferred embodiment, a plurality of fixing blocks are installed on the upper and lower sides of the vacuum insulation layer, and the upper and lower ends of the fixing blocks are connected to the high-temperature resistant metal layer and the ceramic fiber insulation layer respectively.

[0013] As a preferred embodiment, a power supply is installed on the left side of the pressure relay body, and the lower end of the pressure relay body passes through the heat-insulating shell.

[0014] As a preferred embodiment, the bellows expansion tube is a high-temperature resistant stainless steel bellows, and the high-temperature resistant metal layer is made of nickel-based alloy.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are:

[0016] 1. The thermally insulated housing effectively blocks heat transfer from the pressure relay to the interior of the relay in high-temperature environments. This prevents damage, deformation, or performance degradation of sensitive electronic components and mechanical structures. This ensures the pressure relay maintains stable operation in high-temperature environments.

[0017] 2. By providing air inlets, outlets, an intake fan, an exhaust fan, and a bellows expansion tube, air can circulate within the thermally insulated housing, making the pressure relay less susceptible to damage due to high temperatures. When used in conjunction with the thermally insulated housing, this air circulation can quickly remove the heat generated by the pressure relay as well as the small amount of heat that penetrates from the external environment. Compared to a situation without air circulation, this can significantly reduce the operating temperature of the pressure relay, making it less susceptible to damage to internal components due to high temperatures and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 The figure is a schematic diagram of the overall structure of a pressure relay of the present utility model.

[0020] Figure 2 This is a structural diagram of a pressure relay of the utility model from another perspective.

[0021] Figure 3 This is a schematic structural diagram of the internal section of a pressure relay of the present invention.

[0022] Figure 4The utility model is a schematic diagram of a front cross-section of a heat-insulating shell in a pressure relay.

[0023] In the figure, 1, thermal insulation shell; 11, high temperature resistant metal layer; 12, vacuum insulation layer; 13, fixing block; 14, ceramic fiber insulation layer;

[0024] 2. Insulated door; 3. Pressure relay body;

[0025] 4. Air inlet; 41. Square air guide tube; 42. Connecting air tube; 43. Corrugated expansion tube; 44. Air intake fan; 45. Exhaust fan; 46. Air outlet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1 to 4 , the utility model provides a technical solution: a pressure relay, comprising: a pressure relay body 3, a heat-insulating shell 1 is installed outside the pressure relay body 3;

[0028] An air inlet 4 is provided on the upper left side of the interior of the heat-insulating housing 1, and an air outlet 46 is provided on the lower right side of the interior thereof;

[0029] An air guide square tube 41 is installed at the front end of the air inlet 4 and the air outlet 46 respectively. The front end of the air guide square tube 41 is connected to a corrugated telescopic tube 43 through a connecting air pipe 42. The front end of the left corrugated telescopic tube 43 is connected to an air intake fan 44, and the front end of the right corrugated telescopic tube 43 is connected to an exhaust fan 45.

[0030] The front side of the heat-insulating shell 1 is connected to an heat-insulating door 2 via a hinge.

[0031] The heat-insulating shell 1 includes a high-temperature resistant metal layer 11 , a vacuum heat-insulating layer 12 and a ceramic fiber heat-insulating layer 14 .

[0032] A vacuum insulation layer 12 is provided inside the high-temperature resistant metal layer 11 , and a ceramic fiber insulation layer 14 is provided inside the vacuum insulation layer 12 .

[0033] A plurality of fixing blocks 13 are installed on the upper and lower sides of the vacuum insulation layer 12 . The upper and lower ends of the fixing blocks 13 are connected to the high-temperature resistant metal layer 11 and the ceramic fiber insulation layer 14 respectively.

[0034] A power supply is installed on the left side of the pressure relay body 3 , and the lower end of the pressure relay body 3 passes through the heat-insulating housing 1 .

[0035] The bellows expansion tube 43 is a high-temperature resistant stainless steel bellows, and the high-temperature resistant metal layer 11 is made of a nickel-based alloy.

[0036] See also Figure 1 and Figure 4 , as the first embodiment of the present utility model: Since a heat-insulating shell 1 is provided on the outside of the pressure relay body 3, when used in a high-temperature environment, the heat first encounters the high-temperature resistant metal layer 11 during the conduction process. This layer can withstand the direct impact of the high-temperature environment and block the entry of part of the heat. Next, the vacuum insulation layer 12 utilizes the characteristic of the vacuum having almost no heat conductivity to greatly suppress the conduction of heat and can effectively block the transfer of most of the heat. Finally, the ceramic fiber insulation layer 14 further exerts its excellent heat-insulating effect to block the remaining small amount of heat from the outside, ensuring that the inside of the pressure relay body 3 remains at a relatively low temperature. After the successive blocking of these three layers, the heat entering the inside of the pressure relay body 3 is greatly reduced, so that the pressure relay body 3 can be maintained within a safe operating temperature range even in a high-temperature environment, avoiding damage to internal components due to high temperature, and ensuring the stability and reliability of its performance.

[0037] See also Figures 1 to 3 As a second embodiment of the present invention, further elaborating on the first embodiment, the bellows expansion tube 43 can be extended in advance by the exhaust fan 45 and the intake fan 44. This facilitates adjusting the installation position of the intake fan 44 so that the intake fan 44 and the exhaust fan 45 are away from the high-temperature operating area. When the pressure relay body 3 is in use, the intake fan 44 guides external cold air through the bellows expansion tube 43 into the communication pipe 42. The cold air then enters the heat-insulating housing 1 through the air guide square tube 41 and the air inlet 4. Simultaneously, under the negative pressure of the exhaust fan 45, the air inside the heat-insulating housing 1 is guided through the air outlet 46 into the communication pipe 42, then into the right bellows expansion tube 43 and discharged under the action of the exhaust fan 45. Under the combined action of the exhaust fan 45 and the intake fan 44, air circulates rapidly within the heat-insulating housing 1, thereby removing the heat generated by the pressure relay body 3 and the small amount of heat that penetrates from the external environment. This reduces the risk of damage to internal components due to high temperatures and extends the service life of the pressure relay body 3.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure relay comprising: The pressure relay body (3) is characterized in that a heat-insulating shell (1) is installed on the outside of the pressure relay body (3); An air inlet (4) is provided on the upper left side of the interior of the heat-insulating shell (1), and an air outlet (46) is provided on the lower right side of the interior thereof; An air guide square tube (41) is installed at the front end of each of the air inlet (4) and the air outlet (46). The front end of the air guide square tube (41) is connected to a bellows telescopic tube (43) via a connecting air pipe (42). The front end of the left bellows telescopic tube (43) is connected to an air intake fan (44), and the front end of the right bellows telescopic tube (43) is connected to an exhaust fan (45).

2. A pressure relay according to claim 1, characterized in that: The front side of the heat-insulating shell (1) is connected to an heat-insulating door (2) via a hinge.

3. A pressure relay according to claim 2, characterized in that: The heat-insulating shell (1) comprises a high-temperature resistant metal layer (11), a vacuum heat-insulating layer (12), and a ceramic fiber heat-insulating layer (14).

4. A pressure relay according to claim 3, characterized in that: A vacuum heat insulation layer (12) is provided on the inner side of the high-temperature resistant metal layer (11), and a ceramic fiber heat insulation layer (14) is provided on the inner side of the vacuum heat insulation layer (12).

5. A pressure relay according to claim 4, characterized in that: Multiple groups of fixing blocks (13) are respectively installed on the upper and lower sides of the vacuum insulation layer (12), and the upper and lower ends of the fixing blocks (13) are respectively connected to the high-temperature resistant metal layer (11) and the ceramic fiber insulation layer (14).

6. A pressure relay according to claim 1, characterized in that: A power source is installed on the left side of the pressure relay body (3), and the lower end of the pressure relay body (3) passes through the heat-insulating housing (1).

7. A pressure relay according to claim 4, characterized in that: The bellows expansion tube (43) is a high-temperature resistant stainless steel bellows, and the high-temperature resistant metal layer (11) is made of a nickel-based alloy.

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