Preheating device for screw machine in low-temperature environment

Abstract

The utility model relates to the field of preheating of screw machines, and discloses a preheating device for a screw machine in a low-temperature environment, the preheating device comprises a screw air compressor shell, a motor support is fixedly mounted on the inner bottom surface of the screw air compressor shell, a driving motor is fixedly mounted on the top surface of the motor support, and a screw shell is fixedly mounted at the front end of the driving motor; an operator firstly starts an electric heating pipe in a heating box body to heat gas in the heating box body, after the heated gas reaches a certain temperature, a fan is started to introduce hot gas into a gas guide pipeline, and then the hot gas enters a heating pipe and a connecting pipe through the gas guide pipeline and is exhausted from a first exhaust hole and a second exhaust hole; by means of the design, preheating operation can be conveniently conducted on the screw shell, the heating pipe and the connecting pipe of the device are installed on the bottom face and the side of the screw shell, influence and interference on the screw shell can be reduced, and it is guaranteed that the screw air compressor can be normally started in the low-temperature environment.

Description

Technical Field

[0001] This application belongs to the technical field of screw machine preheating, and specifically relates to a preheating device for screw machines in low-temperature environments. Background Art

[0002] A screw machine is a type of air compressor. Its working principle is that through the special profile design of the screw rotors, the male and female screws rotate synchronously and at high speed in the housing. This rotation generates a compression effect. The air inhaled from the air inlet is compressed, forms a sealed chamber between the screw and the housing, and moves towards the exhaust port. Finally, the compressed air is discharged. The characteristics of screw machines include simple structure, high energy efficiency, low noise, etc., and are widely used in industrial production fields such as machinery, chemical engineering, and metallurgy.

[0003] In a low-temperature environment, a screw air compressor needs to be preheated before starting. This is because when the ambient temperature is low, the lubricating oil of the screw machine will become thick and its fluidity will deteriorate, which is not conducive to the starting and operation of the machine. At the same time, the metal components inside the machine are prone to shrinkage at low temperatures. If not preheated, it is easy to cause failures or damages.

[0004] Most of the existing preheating methods for screw air compressors use electric heating elements, such as electric heating tapes or heating strips, which are covered outside the screw box to achieve heating. However, the use of electric heating tapes or heating strips can only be installed temporarily and need to be removed after the screw air compressor starts, otherwise it will affect normal operation. Moreover, the installation position of the electric heating tapes or heating strips is limited. If installed improperly, it may damage the cables or other components. The installation of electric heating tapes or heating strips will affect the daily use and maintenance of the screw air compressor, such as replacing the filter element or performing repairs. Therefore, a preheating device for screw machines in low-temperature environments is provided. Summary of the Utility Model

[0005] The purpose of this application is to provide a preheating device for screw machines in low-temperature environments to solve the above-mentioned problems.

[0006] The technical solution adopted in this application is as follows: A preheating device for a screw machine in a low-temperature environment, including a screw air compressor housing, on the inner bottom surface of the screw air compressor housing, a motor support is fixedly installed, on the top surface of the motor support, a driving motor is fixedly installed, at the front end of the driving motor, a screw housing is fixedly installed, on the inner bottom surface of the screw air compressor housing, a housing support is fixedly installed, the top surface of the housing support is fixed to the bottom surface of the screw housing, on the bottom surface of the screw housing, a heating pipe is provided, on the outer surface of the heating pipe, a plurality of connecting pipes are symmetrically and fixedly installed, on the outer surface of the heating pipe near the top, an exhaust hole one is opened, on the outer surface of the connecting pipe, an exhaust hole two is opened, on the inner bottom surface of the screw air compressor housing, a heating box is fixedly installed, at the front end of the heating box, a fan is fixedly installed, at the rear end of the heating box, a gas guiding pipe is fixedly installed, and one end of the gas guiding pipe away from the heating box is fixed to the outer surface of the heating pipe.

[0007] In a preferred embodiment, a plurality of ventilation holes are opened on one side of the screw air compressor housing, and on one side of the screw air compressor housing at the side of the ventilation holes, a U-shaped limit socket is fixedly installed.

[0008] In a preferred embodiment, an intake pipe is fixedly installed at the intake end at the top of the screw housing, at one end of the intake pipe, a circular filter is fixedly installed, and a gas discharge pipe is fixedly installed on the side of the screw housing.

[0009] In a preferred embodiment, a temperature sensor is fixedly installed through the top surface of the screw air compressor housing, the detection end of the temperature sensor extends into the interior of the screw air compressor housing, a control panel is embedded and installed on the front side of the screw air compressor housing, and the heating box, the fan and the temperature sensor are electrically connected to the control panel.

[0010] In a preferred embodiment, an installation ring is fixedly installed on the outer surface of one end of the heating pipe, and a plurality of installation holes are opened on one side of the installation ring.

[0011] In a preferred embodiment, a sealed box door is rotatably connected to the front side of the screw air compressor housing through a hinge provided.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0013] 1. In this application, due to the adoption of the above-mentioned solution, the operator first starts the electric heating tube in the heating box to heat the gas inside the heating box. When the heated gas reaches a certain temperature, the fan starts, introducing the hot gas into the inside of the air guide pipe. Subsequently, the hot gas enters the inside of the heating tube and the connecting pipe through the air guide pipe and is discharged from the first exhaust hole and the second exhaust hole. Such a design facilitates the preheating operation of the screw housing. The heating tube of this device is installed on one side of the housing support through the mounting ring, making the installation and disassembly of the heating tube very convenient. At the same time, the heating tube and the connecting pipe are installed on the bottom surface and the side of the screw housing. Such a design can reduce the interference with the screw housing, making the preheating operation more efficient and ensuring that the screw air compressor can start normally in a low-temperature environment. Description of the Drawings

[0014] Figure 1 is the overall structural schematic diagram of this application;

[0015] Figure 2 is the internal structural schematic diagram of the screw air compressor housing of this application;

[0016] Figure 3 is the structural schematic diagram of the housing support of this application without installation;

[0017] Figure 4 is the structural schematic diagram of the heating tube of this application.

[0018] Reference numerals in the figures: 1. Screw air compressor housing; 2. Motor support; 3. Driving motor; 4. Screw housing; 5. Housing support; 6. Heating tube; 7. Connecting pipe; 8. First exhaust hole; 9. Second exhaust hole; 10. Heating box; 11. Fan; 12. Air guide pipe; 13. Ventilation hole; 14. U-shaped limit socket; 15. Intake pipe; 16. Round filter; 17. Gas discharge pipe; 18. Temperature sensor; 19. Control panel; 20. Mounting ring; 21. Mounting hole; 22. Sealed box door. Detailed Embodiments

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0020] Reference Figure 1, a preheating device for a screw machine in a low-temperature environment, including a screw air compressor housing 1, and a sealing box door 22 is rotatably connected to the front side of the screw air compressor housing 1 through a hinge provided; through the sealing box door 22 provided, it is convenient to seal the screw air compressor housing 1, and a screw air compressor assembly is installed inside the screw air compressor housing 1, so as to protect the screw air compressor assembly.

[0021] Reference Figure 1 、 Figure 2 , a motor support 2 is fixedly installed on the inner bottom surface of the screw air compressor housing 1, and a driving motor 3 is fixedly installed on the top surface of the motor support 2; through the motor support 2 provided, it is convenient to support and install the driving motor 3.

[0022] Reference Figure 1 、 Figure 2 And Figure 3 , a screw housing 4 is fixedly installed at the front end of the driving motor 3, a housing support 5 is fixedly installed on the inner bottom surface of the screw air compressor housing 1, and the top surface of the housing support 5 is fixed to the bottom surface of the screw housing 4; circular hard shock-absorbing rubber blocks are installed on the bottom surfaces of both the housing support 5 and the motor support 2, so as to buffer the vibration generated during the operation of the driving motor 3 and the screw housing 4, and the housing support 5 and the motor support 2 are fixedly installed on the inner bottom surface of the screw air compressor housing 1 through bolts.

[0023] Reference Figure 2 、 Figure 3 And Figure 4 , a heating pipe 6 is arranged on the bottom surface of the screw housing 4, an installation ring 20 is fixedly installed on the outer surface of one end of the heating pipe 6, and a plurality of installation holes 21 are opened on one side of the installation ring 20; when personnel need to install the heating pipe 6, first pass the screw through one side of the plurality of installation holes 21, and then fit the installation ring 20 with one side of the housing support 5, so that it is convenient for personnel to drive the screw into one side of the housing support 5 to install the heating pipe 6. The heating pipe 6 is installed on the top surface of the housing support 5 and is located below the screw housing 4, so that the top surface of the heating pipe 6 is close to the bottom of the screw housing 4, which is convenient for subsequent heating and preheating operations;

[0024] A male and female screw is installed inside the screw housing 4, and the driving motor 3 is connected to the male screw. When the driving motor 3 rotates, it drives the male screw to rotate. At the same time, due to the meshing of the male and female screws, the female screw will also rotate accordingly. The rotation of the male and female screws forms a closed compression chamber inside the screw housing 4. When air enters the screw housing 4, it will be trapped in the compression chamber. As the male and female screws rotate, the volume of the compression chamber continuously decreases, and the air is continuously compressed. When compressed to a certain pressure, the air is discharged from the exhaust port of the screw housing. In this way, the screw air compressor can achieve gas compression.

[0025] Reference Figure 2 、Figure 3 and Figure 4 On the outer surface of the heating pipe 6, a plurality of connecting pipes 7 are symmetrically and fixedly installed. An exhaust hole 8 is provided on the outer surface of the heating pipe 6 near the top. An exhaust hole 9 is provided on the outer surface of the connecting pipe 7. The plurality of connecting pipes 7 are located on the side of the screw housing 4 and are in contact with its side, so as to facilitate better preheating operation of the screw housing 4. Through the provided exhaust hole 8 and exhaust hole 9, it is convenient for the subsequent hot gas to be discharged from the inside, so as to facilitate preheating of the screw housing 4.

[0026] Reference Figure 2 、 Figure 3 and Figure 4 On the inner bottom surface of the screw air compressor housing 1, a heating box 10 is fixedly installed. A fan 11 is fixedly installed at the front end of the heating box 10. A gas guiding pipe 12 is fixedly installed at the rear end of the heating box 10. One end of the gas guiding pipe 12 away from the heating box 10 is fixed to the outer surface of the heating pipe 6. A plurality of electric heating pipes are installed inside the heating box 10, so as to facilitate heating of the gas entering the heating box 10. When the fan 11 starts to operate, the hot gas inside the heating box 10 will enter the inside of the heating pipe 6 and the connecting pipe 7 through the gas guiding pipe 12 and be discharged through the exhaust hole 8 and the exhaust hole 9, so as to facilitate the heating and preheating operation of the bottom and side of the screw housing 4, increase the fluidity of the lubricating oil inside the screw housing 4, and enable the screw air compressor to start normally.

[0027] Reference Figure 1 、 Figure 2 On one side of the screw air compressor housing 1, a plurality of ventilation holes 13 are provided. On one side of the screw air compressor housing 1, a U-shaped limit socket 14 is fixedly installed on the side of the ventilation holes 13. Through the provided plurality of ventilation holes 13, it is convenient for the normal air intake and exhaust of the air compressor. When it is necessary to heat and preheat the compression component of the air compressor, a baffle can be inserted into the inside of the U-shaped limit socket 14, so as to facilitate blocking of the plurality of ventilation holes 13, so that the hot gas inside the screw air compressor housing 1 will not easily escape, and the preheating effect is improved.

[0028] Reference Figure 1 、 Figure 2 At the top air intake end of the screw housing 4, an intake pipe 15 is fixedly installed. One end of the intake pipe 15 is fixedly installed with a circular filter 16. A gas discharge pipe 17 is fixedly installed on the side of the screw housing 4. The outside gas enters the inside of the screw housing 4 through the intake pipe 15 and the circular filter 16 for gas compression. The compressed gas is discharged through the gas discharge pipe 17 and enters the inside of the gas storage tank for storage, so as to facilitate the compression and storage of gas.

[0029] Reference Figure 1 、 Figure 2, a temperature sensor 18 is fixedly installed through the top surface of the screw air compressor housing 1, and the detection end of the temperature sensor 18 extends into the screw air compressor housing 1. A control panel 19 is embedded and installed on the front side of the screw air compressor housing 1. The heating box 10, the fan 11 and the temperature sensor 18 are electrically connected to the control panel 19. By means of the provided control panel 19, it is convenient to control the start of the electric heating tube inside the heating box 10 and the start and stop of the fan 11. The temperature sensor 18 is used to detect the temperature inside the screw air compressor housing 1 and display it on the control panel 19. When the temperature inside the screw air compressor housing 1 is too low and affects the start of the compression component of the screw air compressor, at this time, the operator can control the start of the electric heating tube and the fan 11 inside the heating box 10 through the control panel 19, so as to facilitate the heating and preheating of the compression component of the screw air compressor.

[0030] The implementation principle of an embodiment of the preheating device for a screw machine in a low-temperature environment in this application is as follows: When in a low-temperature environment and the operator needs to preheat the compression components inside the screw air compressor housing, the operator first controls the start of the electric heating tube in the heating box 10 through the control panel 19. The electric heating tube starts to work and heats the gas inside the heating box 10. When the heated gas reaches a certain temperature, the fan 11 starts and introduces the hot gas into the inside of the air guiding pipe 12. The hot gas then enters the inside of the heating tube 6 and the connecting pipe 7 through the air guiding pipe 12 and is discharged from the first exhaust hole 8 and the second exhaust hole 9. Such a design facilitates the preheating operation of the screw housing 4 and improves the fluidity of the lubricating oil inside the screw housing 4. During the preheating process, the operator can insert the baffle into the inside of the U-shaped limit socket 14 to block the flow of the plurality of ventilation holes 13, so that the hot gas inside the screw air compressor housing 1 is not easily discharged, thereby improving the heating effect on the screw housing 4. The heating tube 6 of the device is installed on one side of the housing support 5 through the mounting ring 20, making the installation and disassembly of the heating tube 6 very convenient. At the same time, the heating tube 6 and the connecting pipe 7 are installed on the bottom surface and the side of the screw housing 4. Such a design can reduce the influence and interference on the screw housing 4, making the preheating operation more efficient and ensuring that the screw air compressor can start normally in a low-temperature environment.

[0031] The above embodiments are only used to illustrate the technical solutions of this application, rather than to limit it; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A preheating device for a screw machine in a low-temperature environment, including a screw air compressor housing (1), characterized in that: The inner bottom surface of the screw air compressor housing (1) is fixedly installed with a motor support (2). The top surface of the motor support (2) is fixedly installed with a driving motor (3). The front end of the driving motor (3) is fixedly installed with a screw housing (4). The inner bottom surface of the screw air compressor housing (1) is fixedly installed with a housing support (5). The top surface of the housing support (5) is fixed to the bottom surface of the screw housing (4). The bottom surface of the screw housing (4) is provided with a heating pipe (6). A plurality of connecting pipes (7) are symmetrically and fixedly installed on the outer surface of the heating pipe (6). An exhaust hole one (8) is opened on the outer surface of the heating pipe (6) near the top. An exhaust hole two (9) is opened on the outer surface of the connecting pipe (7). The inner bottom surface of the screw air compressor housing (1) is fixedly installed with a heating box body (10). A fan (11) is fixedly installed at the front end of the heating box body (10). A gas guiding pipe (12) is fixedly installed at the rear end of the heating box body (10). One end of the gas guiding pipe (12) far away from the heating box body (10) is fixed to the outer surface of the heating pipe (6).

2. The preheating device for a screw machine in a low-temperature environment according to claim 1, wherein: A plurality of ventilation holes (13) are opened on one side of the screw air compressor housing (1). A U-shaped limit socket (14) is fixedly installed on one side of the screw air compressor housing (1) beside the ventilation holes (13).

3. The preheating device for a screw machine in a low-temperature environment according to claim 1, characterized in that: An air inlet pipe (15) is fixedly installed at the air inlet end of the top of the screw housing (4). One end of the air inlet pipe (15) is fixedly installed with a circular filter (16). A gas discharge pipe (17) is fixedly installed on the side of the screw housing (4).

4. The preheating device for a screw machine in a low-temperature environment according to claim 1, characterized in that: A temperature sensor (18) is fixedly installed through the top surface of the screw air compressor housing (1). The detection end of the temperature sensor (18) extends into the screw air compressor housing (1). A control panel (19) is embedded and installed on the front side of the screw air compressor housing (1). The heating box body (10), the fan (11) and the temperature sensor (18) are electrically connected to the control panel (19).

5. The preheating device for a screw machine in a low-temperature environment according to claim 1, wherein: An installation ring (20) is fixedly installed on the outer surface of one end of the heating pipe (6). A plurality of installation holes (21) are opened on one side of the installation ring (20).

6. The preheating device for a screw machine in a low-temperature environment according to claim 1, characterized in that: A sealed box door (22) is rotatably connected to the front side of the screw air compressor housing (1) through a hinge provided.

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