Overload protection device of centrifugal steam compressor

Abstract

The utility model discloses an overload protection device for a centrifugal steam compressor, which belongs to the technical field of electric appliance protection equipment and comprises a relay entity and a main contact mounted on one side of the relay entity, and two sides of the relay entity are respectively provided with a limiting plate connected with a limiting component and a protection plate connected with a protection component. The protection plate is placed above the main contact by adjusting the angle of the telescopic rod, the main contact is protected through the protection plate, at the moment, the limiting plate is tightly attached to the telescopic rod under the action of the protection assembly, the telescopic rod is prevented from moving freely in the storage process, the protection effect on the main contact is reduced, and the service life of the main contact is prolonged. When the relay entity and the contactor are installed, the limiting of the telescopic rod by the limiting plate is canceled, the telescopic rod is rotated and the length of the telescopic rod is adjusted, the control panel is protected, and the situation that the whole use of the device is affected due to the fact that the control panel is mistakenly touched due to misoperation and the like in the using process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical protection equipment, in particular to an overload protection device for a centrifugal steam compressor. Background Art

[0002] The overload protection device of a centrifugal steam compressor is an important device used to ensure that the compressor can be protected in time under abnormal working conditions. The overload protection device can be mechanical, electrical or electronic. Thermal relay is one of them. It uses the heat generated when current passes through the heating element to bend the bimetallic strip and push the contact to operate.

[0003] An existing thermal relay needs to be used in conjunction with a contactor. There is a lack of protection for the thermal relay contacts during storage, which makes the contacts susceptible to damage due to bending and deformation caused by external pressure when not in use, thus affecting the use of the thermal relay. During installation, the main contacts of the thermal relay are usually plugged into the main contacts in the contactor. In order to ensure a stable connection between the thermal relay and the contactor, a screw fixing method is used for stable connection. However, this method may cause the main contacts to move slightly when tightening the screws, thereby affecting the tightness of the connection and reducing the use effect of the thermal relay. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that the thermal relay contacts are lack of protection during storage, which results in the main contacts being easily damaged by bending and deformation due to external pressure when not in use, thereby affecting the use of the thermal relay. During installation, the main contacts of the thermal relay are usually plugged into the main contacts in the contactor, and screws are used to ensure a stable connection between the thermal relay and the contactor. When tightening the screws, the main contacts may move slightly, thereby affecting the tightness of the connection and reducing the use effect of the thermal relay. The centrifugal steam compressor overload protection device is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A centrifugal steam compressor overload protection device comprises a relay entity and a main contact installed on one side of the relay entity, wherein a control panel is arranged on the top of the relay entity, and limit assemblies are respectively arranged on both sides of the relay entity, wherein the limit assemblies are connected with limit plates for clamping a thermal relay and a contactor; and protection assemblies are respectively arranged on the sides of the relay entity, wherein the protection assemblies are connected with protection plates for protecting the main contacts and the control panel.

[0007] Preferably, the limit assembly includes an L-shaped plate fixedly connected to one side of the relay entity, a movable rod movably installed between the limit plate and the L-shaped plate through a movable groove, and an outer cylinder installed on the side of the limit plate, a buffer spring is sleeved on the movable rod, and the two ends of the buffer spring are respectively connected to the limit plate and the L-shaped plate, a threaded rod is installed on the internal thread, and a piston and a button that fit the inner wall of the outer cylinder are respectively installed on the two ends of the threaded rod.

[0008] Preferably, the protection assembly comprises telescopic rods hingedly mounted on both sides of the relay entity through a mounting seat, and the protection plate is mounted between the two telescopic rods.

[0009] Preferably, a movable hole is opened at the telescopic end of the telescopic rod, a connecting rod is installed on the protection plate, the connecting rod is movably installed at the end of the telescopic rod through the movable hole, and a nut and an external thread matching the nut are provided on the connecting rod.

[0010] Preferably, the protection plate is made of a visible transparent material.

[0011] Preferably, the two limiting plates are each provided with an air suction hole corresponding to the outer cylinder, and the limiting plates are each provided with a rubber pad.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. After the relay entity and the contactor are installed, the limit plate can be supported by the elastic force of the spring to clamp the connection between the relay entity and the contactor. The piston is driven to move by rotating the screw to generate negative pressure in the outer cylinder and the air intake hole. Under the sealing effect of the sponge pad, the connection between the relay entity and the contactor is stabilized, so as to prevent the main contact on the relay entity from falling off from the contactor, thereby affecting the overall use of the device.

[0014] 2. By providing a mounting base, a telescopic rod and a protective plate, the protective plate can be placed above the main contact by adjusting the angle of the telescopic rod before installing the relay entity and the contactor, and the main contact is protected by the protective plate. At this time, under the action of the protection component, the limit plate is close to the telescopic rod, and the telescopic rod is positioned. The connecting rod is limited by rotating the nut on the connecting rod to prevent the telescopic rod from moving freely during storage, causing the limit plate to move, so that the main contact is exposed, thereby reducing the protective effect of the main contact. When installing the relay entity and the contactor, the limit plate on the telescopic rod is cancelled, the telescopic rod is rotated and the length of the telescopic rod is adjusted until the protective plate connected to the end of the telescopic rod moves to the top control panel of the relay entity, so as to protect the control panel and avoid accidental touching of the control panel due to operating errors during use, thereby affecting the overall use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the centrifugal steam compressor overload protection device proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure installation of the centrifugal steam compressor overload protection device proposed by the utility model;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 A schematic diagram of the installation structure of the protection plate of the centrifugal steam compressor overload protection device proposed by the utility model;

[0019] Figure 5 Schematic diagram of the installation structure of the limit assembly of the centrifugal steam compressor overload protection device proposed by the utility model

[0020] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0021] In the figure: 1. Relay entity; 11. Main contact; 12. Control panel; 13. Limit plate; 14. Protection plate; 2. Limit assembly; 201. Movable groove; 202. Air intake hole; 21. L-shaped plate; 22. Movable rod; 23. Buffer spring; 24. Outer cylinder; 25. Threaded rod; 26. Piston; 27. Button; 3. Protection assembly; 301. Movable hole; 31. Mounting seat; 32. Telescopic rod; 141. Connecting rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] Reference Figure 1-6A centrifugal steam compressor overload protection device includes a relay entity 1 and a main contact 11 installed on one side of the relay entity 1, a control panel 12 is arranged on the top of the relay entity 1, and limit components 2 are respectively arranged on both sides of the relay entity 1, and the limit components 2 are connected to limit plates 13 for clamping thermal relays and contactors; protection components 3 are respectively arranged on the sides of the relay entity 1, and the protection components 3 are connected to protection plates 14 for protecting the main contacts 11 and the control panel 12.

[0025] Furthermore, the limit assembly 2 includes an L-shaped plate 21 fixedly connected to one side of the relay entity 1, a movable rod 22 movably installed between the limit plate 13 and the L-shaped plate 21 through a movable groove 201, and an outer cylinder 24 installed on the side of the limit plate 13, a buffer spring 23 is sleeved on the movable rod 22, and the two ends of the buffer spring 23 are respectively connected to the limit plate 13 and the L-shaped plate 21, a threaded rod 25 is installed on the inner thread of the outer cylinder 24, and a piston 26 and a button 27 that fit the inner wall of the outer cylinder 24 are respectively installed on the two ends of the threaded rod 25.

[0026] It is worth noting that: the two limiting plates 13 are both provided with air suction holes 202 corresponding to the outer cylinder 24 , and the limiting plates 13 are both provided with rubber pads.

[0027] Further benefits of adopting the above are:

[0028] By pulling the movable rod 22, the limit plate 13 is driven to move to both sides, and the elastic action of the buffer spring 23 drives the movable rod 22 and the limit plate 13 to reset, so as to squeeze and fix the object, and then the piston 26 is driven to move upward by rotating the threaded rod 25, so that negative pressure is generated in the outer cylinder 24 and the suction hole 202, and suction is generated under the sealing auxiliary action of the rubber pad to achieve the limiting effect.

[0029] Embodiment 2 proposed based on Embodiment 1:

[0030] Reference Figure 2-4 The protection assembly 3 includes telescopic rods 32 hingedly mounted on both sides of the relay entity 1 through a mounting seat 31 , and the protection plate 14 is mounted between the two telescopic rods 32 .

[0031] It should be noted that: a movable hole 301 is opened at the telescopic end of the telescopic rod 32, a connecting rod 141 is installed on the protection plate 14, and the connecting rod 141 is movably installed on the end of the telescopic rod 32 through the movable hole 301. The connecting rod 141 is provided with a nut and an external thread adapted to the nut.

[0032] It is worth noting that the protection plate 14 is made of a visible transparent material, which not only provides protection but also facilitates engineers to observe the surface.

[0033] A further benefit of adopting the above method is that the position of the protection plate 14 is adjusted by the protection component 3 until the protection plate 14 moves to the top of the main contact 11, thereby achieving a protective effect on the main contact 11, and the protection plate 14 is driven to be located on the top of the control panel 12 by rotating the telescopic rod 32, and the direction of the protection plate 14 is adjusted by the movable connecting rod 141, thereby achieving a protective effect on the control panel 12.

[0034] When the relay entity 1 is not in use, the telescopic rod 32 is rotated to one side of the relay entity 1 until the protection plate 14 is located above the main contact 11, and the nut on the connecting rod 141 is rotated to limit the connecting rod 141 to prevent the protection plate 14 from rotating under the impact of external force. At this time, the telescopic rod 32 is limited by the limiting plate 13 to prevent the protection plate 14 from moving arbitrarily and causing the main contact 11 to be exposed to the outside and damaged by external force. When the relay entity 1 needs to be used, the limiting plate 13 is driven by pulling the movable rod 22 to cancel the limit on the telescopic rod 32. The movable telescopic rod 32 drives the protection plate 14 to be located at the top of the control panel 12. The direction of the protection plate 14 is adjusted by the connecting rod 141 and the movable hole 301 to ensure that the protection plate 14 covers the control panel 12, thereby realizing the protection of the control panel 12 by the protection plate 14. At this time, the limit plate 13 is located at the connection between the relay entity 1 and the contactor. The connection is fixed by the spring-driven limit plate 13. The rotating button 27 drives the threaded rod 25 to move upward, thereby driving the piston 26 to move, generating negative pressure inside the outer cylinder 24, and at the same time generating suction with the assistance of the sealing gasket, thereby improving the clamping effect of the limit plate 13.

[0035] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A centrifugal steam compressor overload protection device, comprising a relay entity (1) and a main contact (11) installed on one side of the relay entity (1), characterized in that: A control panel (12) is arranged on the top of the relay entity (1); limit assemblies (2) are arranged on both sides of the relay entity (1); the limit assemblies (2) are connected to limit plates (13) for clamping a thermal relay and a contactor; and protection assemblies (3) are arranged on the sides of the relay entity (1); the protection assemblies (3) are connected to protection plates (14) for protecting main contacts (11) and the control panel (12).

2. The centrifugal steam compressor overload protection device according to claim 1, characterized in that: The limit assembly (2) comprises an L-shaped plate (21) fixedly connected to one side of the relay entity (1), a movable rod (22) movably mounted between the limit plate (13) and the L-shaped plate (21) through a movable groove (201), and an outer cylinder (24) mounted on the side of the limit plate (13); a buffer spring (23) is sleeved on the movable rod (22); two ends of the buffer spring (23) are respectively connected to the limit plate (13) and the L-shaped plate (21); a threaded rod (25) is mounted on the inner thread of the outer cylinder (24); and a piston (26) and a button (27) are respectively mounted on the two ends of the threaded rod (25) and are in contact with the inner wall of the outer cylinder (24).

3. The centrifugal steam compressor overload protection device according to claim 1, characterized in that: The protection assembly (3) comprises telescopic rods (32) hingedly mounted on both sides of the relay entity (1) via a mounting seat (31), and the protection plate (14) is mounted between the two telescopic rods (32).

4. The centrifugal steam compressor overload protection device according to claim 3, characterized in that: A movable hole (301) is provided at the telescopic end of the telescopic rod (32), a connecting rod (141) is installed on the protection plate (14), the connecting rod (141) is movably installed on the end of the telescopic rod (32) through the movable hole (301), and a nut and an external thread matching the nut are provided on the connecting rod (141).

5. The centrifugal steam compressor overload protection device according to claim 1, characterized in that: The protection plate (14) is made of a visible transparent material.

6. The centrifugal steam compressor overload protection device according to claim 1, characterized in that: Both of the two limiting plates (13) are provided with air suction holes (202) corresponding to the outer cylinder (24), and both of the limiting plates (13) are provided with rubber pads.

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