Self-adaptive screw air compressor pressure adjusting device

Abstract

The self-adaptive screw air compressor pressure adjusting device comprises a protective shell, a clamping groove is formed in the surface of the top of the protective shell, a control assembly used for controlling the gas production rate of a screw air compressor is arranged in an inner cavity of the clamping groove, and a protective cylinder is fixedly connected to the middle of the protective shell in an inserted mode. According to the utility model, the resistance rod is pushed upwards, and the contact position of the conductive block and the resistance rod is changed at the same time, so that the length of the resistance rod connected to a circuit is prolonged, and the resistance rod is connected to the circuit. The resistance value is increased under the condition that the power supply voltage is not changed, the current in the circuit is reduced, and the control assembly detects that the current in the circuit is reduced, so that the screw air compressor is automatically controlled to reduce the operating power, the use is convenient, and frequent adjustment is not needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw air compressors, and particularly relates to an adaptive pressure regulating device for screw air compressors. Background Technique

[0002] The pressure regulating device of a screw air compressor is one of the more important devices on a screw air compressor, which can ensure that the screw air compressor works under normal pressure and control the start and stop of the auxiliary air compressor according to the pressure in the cylinder.

[0003] Chinese Patent with Publication No. CN216077532U discloses a gas pressure regulator for an air compressor, including a body and a regulating device installed on the body. A rubber sheet is arranged inside the body. The top end of the rubber sheet is fixedly connected with a first disc. A screw is threadedly inserted into the top of the first disc, and one end of the screw away from the first disc is fixedly connected with a second disc. One end of the second disc away from the screw is provided with an adjusting nut, and a slot is opened at the top end of the adjusting nut; through the coordinated use of a rotating rod, a baffle, a sliding plate, an inserting plate and an adjusting nut, and the cooperation of a limiting spring and a fixing rod, the moving sliding plate can be reset, the rotating rod is driven to rotate, and then the inserting plate drives the adjusting nut to rotate synchronously with the screw. The inserting plate slides into the slot on the adjusting nut, and the cover does not need to be disassembled, and different pressure changes in the regulator can be quickly adjusted, which is convenient for adjusting the pressure regulator.

[0004] The above gas pressure regulator can quickly adjust different pressure changes in the regulator without disassembling the cover, which is convenient for adjusting the pressure regulator. However, when frequently replacing pneumatic tools during use, it is necessary to adjust the gas pressure regulator used on the air compressor to an appropriate pressure to cooperate with the pneumatic tool, which is inconvenient to adjust and the use process is complicated. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an adaptive pressure regulating device for a screw air compressor to solve the technical defect that the pressure regulation of existing equipment is inconvenient during frequent use.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An adaptive pressure regulating device for a screw air compressor includes a protective shell. A clamping groove is opened on the top surface of the protective shell. A control component for controlling the gas production of the screw air compressor is arranged in the inner cavity of the clamping groove. A protective cylinder is fixedly inserted in the middle of the protective shell. A measuring component for measuring the internal air pressure of the screw air compressor is arranged in the inner cavity of the protective cylinder. A connecting pipe is communicated at the bottom of the protective cylinder, and the other end of the connecting pipe is communicated with a pneumatic joint.

[0008] The measuring component includes a nut cover hermetically connected to the mouth of the protection cylinder. A resistance rod is hermetically inserted in the middle of the nut cover. One end of the resistance rod extends into the inner cavity of the protection cylinder and is fixedly connected to a sliding disk. The sliding disk is slidably connected to the inner cavity of the protection cylinder. A conductive block is slidably connected to the surface of the resistance rod. The top of the conductive block is fixedly connected to a conductive rod. One end of the conductive rod is fixedly inserted into the surface of the nut cover and extends to the outside of the nut cover. A spring is arranged in the inner cavity of the protection cylinder between the nut cover and the sliding disk. Wiring terminals are electrically connected to the tops of both the resistance rod and the conductive rod. The wiring terminals at the tops of the resistance rod and the conductive rod are electrically connected to the control component through wires.

[0009] As a further solution of the present utility model, the control component includes a clamping groove opened on the surface of the protection shell. A single-chip microcomputer is clamped in the inner cavity of the clamping groove. One side of the protection shell is fixedly connected to a frequency converter. The signal output end of the single-chip microcomputer is electrically connected to the signal input end of the frequency converter through a wire. The signal output end of the frequency converter is electrically connected to the signal input end of the screw air compressor through a wire. The wiring terminal at the top of the conductive rod is electrically connected to the signal output end of the single-chip microcomputer through a wire. The wiring terminal at the top of the resistance rod is electrically connected to the signal input end of the single-chip microcomputer through a wire.

[0010] As a further solution of the present utility model, an external thread is provided on the surface of the mouth of the protection cylinder. The mouth of the protection cylinder is threadedly connected to the nut cover through the external thread.

[0011] As a further solution of the present utility model, a threaded rod is fixedly connected to the bottom of the resistance rod. The threaded rod threadedly penetrates through the surface of the sliding disk and is threadedly connected to a nut. The nut closely adheres to the bottom surface of the sliding disk.

[0012] As a further solution of the present utility model, a plurality of groups of suction cups are fixedly arranged on one side surface of the protection shell.

[0013] As a further solution of the present utility model, a plurality of groups of rubber rings are sleeved on the outer circular surface of the sliding disk

[0014] Compared with the prior art, an adaptive screw air compressor pressure regulating device provided by the present utility model has the following beneficial effects:

[0015] 1. The gas inside the screw air compressor in the device enters the inner cavity of the protection cylinder through the connecting pipe. When the air pressure inside the screw air compressor gradually increases, the air pressure pushes the sliding disk upward along the inner cavity of the protection cylinder, and at the same time pushes the resistance rod upward, changing the contact position between the conductive block and the resistance rod, thereby extending the length of the resistance rod connected to the circuit, increasing the resistance value. And according to Ohm's law, when the power supply voltage remains unchanged, as the resistance increases, the current in the circuit will decrease. The control component detects that the current in the circuit becomes smaller, and thus automatically controls the screw air compressor to reduce the operating power, reducing the gas production volume, which is convenient for use and does not require frequent adjustment.

[0016] 2. In this device, the single-chip microcomputer outputs a control signal to the frequency converter to adjust the output power of the screw air compressor, thereby changing the gas production capacity of the screw air compressor. Furthermore, the method of efficiently, precisely, and reliably adjusting the operating speed of the screw air compressor helps to improve the performance and energy-saving effect of the screw air compressor.

[0017] 3. After the device has been used for a long time and the elastic potential energy of the spring decreases and the spring needs to be replaced, first loosen the nut cover and pull up the resistance rod, thereby pulling out the spring and the sliding disk together from the inner cavity of the protection cylinder to replace the spring, and detecting the wear degree of the sliding disk and the rubber ring to determine whether they need to be replaced, thus improving the maintainability of the device and facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only individual cases of the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of the nut cover in the embodiment of the present invention;

[0021] Figure 3 is a schematic cross-sectional structural diagram of the protection cylinder in the embodiment of the present invention.

[0022] Reference Signs:

[0023] 100, connecting pipe; 101, protection cylinder; 102, protection shell; 103, suction cup; 104, clamping groove; 105, single-chip microcomputer; 106, nut cover; 107, frequency converter; 108, external thread; 109, wiring terminal; 110, pneumatic joint; 200, resistance rod; 201, conductive rod; 202, conductive block; 300, threaded rod; 301, spring; 302, rubber ring; 303, sliding disk; 304, nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following further details the embodiments of the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present utility model.

[0026] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, an integral connection, or a detachable connection; it may be the communication inside two elements; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0027] See the attached Figures 1-3 As shown in the figure, an adaptive screw air compressor pressure regulating device according to an embodiment of the present utility model includes a protective housing 102. A clamping groove 104 is formed on the top surface of the protective housing 102. A control assembly for controlling the gas production of the screw air compressor is arranged in the inner cavity of the clamping groove 104. A protective cylinder 101 is fixedly inserted in the middle of the protective housing 102. A measuring assembly for measuring the internal air pressure of the screw air compressor is arranged in the inner cavity of the protective cylinder 101. A connecting pipe 100 is communicated at the bottom of the protective cylinder 101, and the other end of the connecting pipe 100 is communicated with a pneumatic joint 110.

[0028] The measuring assembly includes a nut cover 106 hermetically connected to the mouth of the protective cylinder 101. A resistance rod 200 is hermetically inserted in the middle of the nut cover 106. One end of the resistance rod 200 extends into the inner cavity of the protective cylinder 101 and is fixedly connected with a sliding disc 303. The sliding disc 303 is slidably connected to the inner cavity of the protective cylinder 101. A conductive block 202 is slidably connected to the surface of the resistance rod 200. The top of the conductive block 202 is fixedly connected with a conductive rod 201. One end of the conductive rod 201 is fixedly inserted into the surface of the nut cover 106 and extends to the outside of the nut cover 106. A spring 301 is arranged in the inner cavity of the protective cylinder 101 between the nut cover 106 and the sliding disc 303. Wiring terminals 109 are electrically connected to the tops of both the resistance rod 200 and the conductive rod 201. The wiring terminals 109 at the tops of the resistance rod 200 and the conductive rod 201 are electrically connected to the control assembly through wires.

[0029] The gas inside the screw air compressor enters the inner cavity of the protection cylinder 101 through the connecting pipe 100. When the air pressure inside the screw air compressor gradually increases, the air pressure pushes the sliding disk 303 upward along the inner cavity of the protection cylinder 101, and at the same time, pushes the resistance rod 200 upward, and at the same time changes the contact position between the conductive block 202 and the resistance rod 200, thereby extending the length of the resistance rod 200 connected to the circuit, increasing the resistance value. And according to Ohm's law, when the power supply voltage remains unchanged, as the resistance increases, the current in the circuit will decrease. The control component detects that the current in the circuit becomes smaller, so as to automatically control the screw air compressor to reduce the operating power, reduce the gas production volume, and thus facilitate use, without frequent adjustment, which is very convenient.

[0030] The control component includes a clamping groove 104 opened on the surface of the protection shell 102. The inner cavity of the clamping groove 104 is clamped with a single-chip microcomputer 105, where the model of the single-chip microcomputer 105 is the STM32 series single-chip microcomputer. One side of the protection shell 102 is fixedly connected with an inverter 107, where the model of the inverter 107 is the Mitsubishi FR-D720S series single-chip microcomputer. The signal output end of the single-chip microcomputer 105 is electrically connected to the signal input end of the inverter 107 through a wire. The signal output end of the inverter 107 is electrically connected to the signal input end of the screw air compressor through a wire. The wiring terminal 109 located at the top of the conductive rod 201 is electrically connected to the signal output end of the single-chip microcomputer 105 through a wire. The wiring terminal 109 located at the top of the resistance rod 200 is electrically connected to the signal input end of the single-chip microcomputer 105 through a wire. Through the setting of the single-chip microcomputer 105 and the inverter 107, the single-chip microcomputer 105 outputs a control signal to the inverter 107 to adjust the output power of the screw air compressor, thereby changing the gas production capacity of the screw air compressor. Furthermore, in a way that can efficiently, accurately and reliably adjust the operating speed of the screw air compressor, it helps to improve the performance and energy-saving effect of the screw air compressor.

[0031] See Figure 3 As shown, the outer surface of the mouth of the protection cylinder 101 is provided with an external thread 108. The mouth of the protection cylinder 101 is threadedly connected with a nut cover 106 through the external thread 108. The bottom of the resistance rod 200 is fixedly connected with a threaded rod 300. The threaded rod 300 threadedly penetrates the surface of the sliding disk 303 and is threadedly connected with a nut 304. The nut 304 is closely attached to the bottom surface of the sliding disk 303. When the elastic potential energy of the spring 301 decreases after long-term use and the spring 301 needs to be replaced, first loosen the nut cover 106. And pull the resistance rod 200 upward, so as to pull out the spring 301 and the sliding disk 303 together from the inner cavity of the protection cylinder 101. Then replace the spring 301, and detect the wear degree of the sliding disk 303 and the rubber ring 302 to decide whether it needs to be replaced, thereby improving the maintainability of the device and facilitating its maintenance.

[0032] On one side surface of the protective case 102, several groups of suction cups 103 are fixedly arranged, which facilitates the installation of the device on the surface of the screw air compressor.

[0033] Several groups of rubber rings 302 are sleeved on the outer circumferential surface of the sliding disk 303 to improve the airtightness between the sliding disk 303 and the protective cylinder 101, ensuring that gas will not leak out from the inner wall between the sliding disk 303 and the protective cylinder 101.

[0034] When the embodiment of the present utility model is in use, the device is adsorbed on the surface of the screw air compressor by using the suction cups 103. The pneumatic joint 110 at one end of the connecting pipe 100 is connected to the air outlet end of the screw air compressor. Thus, the gas inside the screw air compressor enters the inner cavity of the protective cylinder 101 through the connecting pipe 100. When the air pressure inside the screw air compressor gradually increases, the air pressure pushes the sliding disk 303 upward along the inner cavity of the protective cylinder 101. While pushing, the resistance rod 200 is pushed upward, changing the contact position between the conductive block 202 and the resistance rod 200. Thus, the length of the resistance rod 200 connected to the circuit is extended, and further the resistance value is increased. And according to Ohm's law, when the power supply voltage remains unchanged, as the resistance increases, the current in the circuit will decrease. When the single-chip microcomputer 105 detects that the current becomes smaller, according to the degree of decrease, the operation speed of the screw air compressor is adjusted by the frequency converter 107, and further the air production volume of the screw air compressor is reduced.

[0035] When the elastic potential energy of the spring 301 decreases after long-term use and the spring 301 needs to be replaced, loosen the nut cover 106 and pull the resistance rod 200 upward, pulling the spring 301 and the sliding disk 303 out of the inner cavity of the protective cylinder 101 together, replacing the spring 301, and detecting the wear degree of the sliding disk 303 and the rubber ring 302 to decide whether they need to be replaced.

[0036] The above shows and describes the basic principle of the present invention. The above is only the preferred embodiment of the present invention and is not used to limit the present invention. The descriptions in the above embodiment and the specification only illustrate the principle of the present invention. Without departing from the scope of the present invention, any modifications, equivalent replacements, and improvements made within the spirit and scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adaptive screw air compressor pressure regulating device, comprising a protective shell (102), characterized in that: The top surface of the protective shell (102) is provided with a snap-in groove (104), the inner cavity of the snap-in groove (104) is provided with a control component for controlling the gas output of the screw air compressor, a protective cylinder (101) is fixedly plugged into the middle of the protective shell (102), the inner cavity of the protective cylinder (101) is provided with a measuring component for measuring the internal air pressure of the screw air compressor, the bottom of the protective cylinder (101) is connected to a connecting pipe (100), and the other end of the connecting pipe (100) is connected to a pneumatic joint (110); The measuring assembly comprises a nut cover (106) sealedly connected to the mouth of the protective tube (101); a resistance rod (200) is sealedly inserted in the middle of the nut cover (106); one end of the resistance rod (200) extends into the inner cavity of the protective tube (101) and is fixedly connected to a sliding disk (303); the sliding disk (303) is slidably connected to the inner cavity of the protective tube (101); a conductive block (202) is slidably connected to the surface of the resistance rod (200); and a conductive rod (202) is fixedly connected to the top of the conductive block (202). 201), one end of the conductive rod (201) is fixedly inserted into the surface of the nut cover (106) and extends to the outside of the nut cover (106), and a spring (301) is provided in the inner cavity of the protective tube (101) between the nut cover (106) and the sliding plate (303), and the tops of the resistance rod (200) and the conductive rod (201) are both electrically connected to the wiring terminals (109), and the wiring terminals (109) at the tops of the resistance rod (200) and the conductive rod (201) are both electrically connected to the control component through wires.

2. The self-adaptive screw air compressor pressure regulating device according to claim 1, characterized in that: The control component comprises a snap-in slot (104) provided on the surface of the protective shell (102); a single-chip computer (105) is snap-into an inner cavity of the snap-in slot (104); a frequency converter (107) is fixedly connected to one side of the protective shell (102); a signal output end of the single-chip computer (105) is electrically connected to a signal input end of the frequency converter (107) via a wire; the signal output end of the frequency converter (107) is electrically connected to a signal input end of a screw air compressor via a wire; a wiring terminal (109) located at the top of the conductive rod (201) is electrically connected to the signal output end of the single-chip computer (105) via a wire; and the wiring terminal (109) located at the top of the resistance rod (200) is electrically connected to the signal input end of the single-chip computer (105) via a wire.

3. The self-adaptive screw air compressor pressure regulating device according to claim 2, characterized in that: The surface of the mouth of the protection tube (101) is provided with an external thread (108), and the mouth of the protection tube (101) is threadedly connected to a nut cover (106) via the external thread (108).

4. The self-adaptive screw air compressor pressure regulating device according to claim 3, characterized in that: The bottom of the resistance rod (200) is fixedly connected to a threaded rod (300), the threaded rod (300) is threadedly penetrated through the surface of the sliding disk (303) and is threadedly connected to a nut (304), and the nut (304) is tightly attached to the bottom surface of the sliding disk (303).

5. The self-adaptive screw compressor pressure regulating device according to claim 4, characterized in that: A plurality of groups of suction cups (103) are fixedly arranged on one side surface of the protective shell (102).

6. The self-adaptive screw compressor pressure regulating device according to claim 5, characterized in that: The outer circumferential surface of the sliding plate (303) is sleeved with a plurality of groups of rubber rings (302).

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