Grease injection barrel capable of automatically detecting grease quantity

Abstract

The grease injection barrel capable of automatically detecting the grease quantity comprises a barrel body, a barrel cover, an oil pressing disc assembly and a pull rope displacement sensor, the barrel cover is fixed to the open end of the barrel body and seals the barrel body, the oil pressing disc assembly comprises an oil pressing disc, a guide rod and a compression spring, the guide rod is sleeved with the oil pressing disc and the compression spring, and the pull rope displacement sensor is arranged on the guide rod. The oil pressing disc is in sliding fit with the guide rod, the two ends of the guide rod are fixed to the cylinder cover and the closed end of the cylinder body respectively, the oil pressing disc is in sliding fit with the inner wall of the cylinder body, the two ends of the compression spring abut against the cylinder cover and the oil pressing disc respectively, the oil pressing disc divides an inner cavity of the cylinder body into two cavities, the cavity where the compression spring is located is an air cavity, and the other cavity is a grease cavity. A grease outlet is formed in the closed end of the barrel, a main body of the pull rope displacement sensor is installed on the outer side of the barrel cover, and the pull rope penetrates through the barrel cover to be connected to the oil pressing disc. The device is compact in structure, can be mounted at any angle, and can ensure accurate grease quantity detection.

Description

Technical Field

[0001] The utility model relates to a grease injection cylinder with a grease amount self-checking function. Background Art

[0002] Most of the commonly used grease cylinders currently do not have a grease quantity detection mechanism. The few grease cylinders that have a grease quantity detection mechanism mostly use analog detection methods such as floats or ultrasound. Affected by the installation method and operating conditions, there are many unsatisfactory aspects: (1) Large measurement errors and low sensitivity lead to inaccurate liquid level display, affecting the accurate control of the lubricating oil quantity; (2) High failure rate and poor reliability require frequent maintenance and replacement, which increases equipment maintenance costs and downtime; (3) Poor environmental adaptability and is easily affected by external factors such as electromagnetic interference and mechanical vibration, which affects the accuracy of detection; (4) There are safety hazards. The inconvenient installation leads to poor safety and is prone to safety accidents such as oil leaks and leakages. Utility Model Content

[0003] The utility model provides a grease injection cylinder which can automatically detect the amount of grease and can be installed at any angle while ensuring accurate grease amount detection.

[0004] The main technical solutions of the utility model are:

[0005] A grease injection cylinder capable of automatically detecting the amount of grease comprises a cylinder body, a cylinder cover, an oil pressure plate assembly and a pull-rope displacement sensor. The cylinder cover is fixed to the open end of the cylinder body and closes the cylinder body. The oil pressure plate assembly comprises an oil pressure plate, a guide rod and a compression spring. The oil pressure plate and the compression spring are both sleeved on the guide rod. The oil pressure plate is slidably matched with the guide rod. The two ends of the guide rod are respectively fixed on the cylinder cover and the closed end of the cylinder body. The oil pressure plate is slidably matched with the inner wall of the cylinder. The two ends of the compression spring are respectively against the cylinder cover and the oil pressure plate. The oil pressure plate divides the inner cavity of the cylinder into two cavities. The cavity where the compression spring is located is an air cavity, and the other cavity is a grease cavity. A grease outlet is provided on the closed end of the cylinder body. The main body of the pull-rope displacement sensor is installed on the outside of the cylinder cover. The pull rope passes through the cylinder cover and is connected to the oil pressure plate.

[0006] A sealing ring is arranged on the cylindrical surface of the oil pressure plate and the inner wall of the cylinder in sliding cooperation.

[0007] The fixing points of the guide rod, the cylinder cover and the closed end of the cylinder body are respectively located at the center points of the cylinder cover and the closed end of the cylinder body.

[0008] The grease injection cylinder is provided with multiple grease outlets.

[0009] The grease injection cylinder capable of automatically detecting the amount of grease may further include a grease overflow valve, wherein the grease overflow valve is a one-way valve, which is installed on the side wall of the grease injection cylinder, and the grease cavity of the grease injection cylinder is connected to the inlet of the one-way valve.

[0010] A grease filling port may also be provided on the closed end of the cylinder or on the side wall of the cylinder near the closed end.

[0011] The cylinder body may be formed by a tubular shell and a bottom plate fixedly connected, and the bottom plate constitutes the closed end of the cylinder body.

[0012] The cross-sectional shape of the cylinder is preferably a rounded rectangle.

[0013] The oil pressure plate assembly preferably further comprises a guide sleeve, which is fixed on the oil pressure plate, and the oil pressure plate is slidably matched with the guide rod via the guide sleeve.

[0014] The guide sleeve is preferably a copper guide sleeve.

[0015] The beneficial effects of the utility model are:

[0016] Since the grease in the grease cylinder is fixed by the oil pressing plate assembly, the grease injection cylinder can be installed in any direction and position.

[0017] A pull-rope displacement sensor is used to detect the amount of grease in the grease injection cylinder. The displacement of the oil pressure plate is sensed by the change in the tension and relaxation state of the steel wire pull rope. This sensor is not affected by the installation angle and position of the grease injection cylinder, nor by external environmental factors, and can ensure the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an embodiment of the grease injection cylinder capable of automatically detecting the amount of grease.

[0019] Reference numerals:

[0020] 1. Grease injection cylinder; 11. Cylinder body; 12. Cylinder cover; 13. Oil pressure plate; 14. Guide rod; 15. Compression spring; 16. Guide sleeve;

[0021] 7. Draw rope displacement sensor; 71. Steel wire rope. DETAILED DESCRIPTION

[0022] like Figure 1As shown, the utility model discloses a grease injection cylinder 1 capable of automatically detecting the amount of grease, comprising a cylinder 11, a cylinder cover 12, an oil pressure plate assembly and a pull rope displacement sensor 7. The cylinder is open at one end and closed at the other end, and the cylinder cover is fixed to the open end of the cylinder and closes the cylinder. The oil pressure plate assembly comprises an oil pressure plate 13, a guide rod 14 and a compression spring 15, the oil pressure plate and the compression spring are both sleeved on the guide rod, and the oil pressure plate and the guide rod are slidably matched. The two ends of the guide rod are respectively fixed on the cylinder cover and the closed end of the cylinder. The oil pressure plate is slidably matched with the inner wall of the cylinder. The two ends of the compression spring are respectively against the cylinder cover and the oil pressure plate, and the oil pressure plate divides the inner cavity of the cylinder into two cavities with variable volumes, the cavity where the compression spring is located is an air cavity, and the other cavity is a grease cavity. A grease outlet is provided on the closed end of the cylinder. The main body of the pull rope displacement sensor is installed on the outside of the cylinder cover, and the steel wire pull rope 71 passes through the cylinder cover and is connected to the oil pressure plate.

[0023] As the grease in the grease cavity is gradually sucked out from the grease outlet, the amount of grease gradually decreases. Under the pressure of the compression spring, the oil pressure plate moves toward the closed end of the cylinder, and the grease cavity is always kept full until the amount of grease is so low that grease needs to be added to the grease injection cylinder. The grease output of the grease from the grease injection cylinder is suspended. Then grease is added to the grease cavity of the grease injection cylinder. As the amount of grease increases, the oil pressure plate is pressed back to a position close to the cylinder cover, and the grease injection cylinder is ready to continue to output grease. In this process, the wire rope relaxes or contracts with the movement of the oil pressure plate, and the rope displacement sensor senses the displacement of the oil pressure plate. Combined with the inner diameter of the grease injection cylinder, the displacement of the oil pressure plate can be converted into the amount of grease and its change.

[0024] Since the oil pressure plate assembly can always fix the grease in the grease cylinder, the grease cylinder can be installed in any direction and position. The pull-wire displacement sensor can also adapt well to the installation of the grease cylinder at any angle and can accurately output signals, solving the problems of large measurement errors, poor environmental adaptability and low reliability of the existing grease amount detection method for the grease cylinder. Since the steel wire pull rope cannot contact the grease cavity, the grease amount detection will not cause oil leakage in the grease cylinder, so the installation structure of the pull-wire displacement sensor is relatively simple, while ensuring reliable operation.

[0025] The grease injection cylinder capable of automatically detecting the amount of grease may be optimized in one or more of the following aspects:

[0026] A sealing ring is arranged on the cylindrical surface of the oil pressure plate and the inner wall of the cylinder for sliding cooperation, so as to effectively separate the air cavity and the grease cavity and ensure that the grease in the grease cavity does not leak.

[0027] The fixing points of the guide rod, the cylinder cover and the closed end of the cylinder body are respectively located at the center points of the cylinder cover and the closed end of the cylinder body.

[0028] The grease injection cylinder is provided with a plurality of grease outlets, two of which are shown in the accompanying drawing.

[0029] The grease injection cylinder capable of automatically detecting the amount of grease also includes a grease overflow valve, which is a one-way valve installed on the side wall of the grease injection cylinder, and the grease cavity of the grease injection cylinder is connected to the inlet of the one-way valve. When grease is added to the grease injection cylinder, when grease is discharged from the outlet of the grease overflow valve, it can be determined that the grease injection cylinder is full.

[0030] A grease filling port is also provided on the closed end of the cylinder or on the side wall of the cylinder near the closed end for automatic grease injection.

[0031] The cylinder body may be formed by a tubular shell and a bottom plate fixedly connected, and the bottom plate constitutes the closed end of the cylinder body.

[0032] The cross-sectional shape of the cylinder is preferably a rounded rectangle. The flat and thin structural feature of this shape makes it easier to find a suitable installation space for the grease injection cylinder on equipment such as coal mining machines, while making the corresponding space as fully utilized as possible.

[0033] The oil pressure plate assembly further comprises a guide sleeve 16, which is fixed on the oil pressure plate, and the oil pressure plate is slidably matched with the guide rod through the guide sleeve. The guide sleeve can play a role in assisting the positioning of the oil pressure plate.

[0034] The guide sleeve may be a copper guide sleeve.

[0035] The utility model discloses a grease injection barrel capable of automatically detecting the amount of grease, which can be installed at any angle and can realize accurate grease amount detection, thereby solving the problems of large measurement error, poor environmental adaptability and low reliability of the existing grease injection barrel grease amount detection method.

Claims

1. A grease injection cylinder capable of automatically detecting the amount of grease, characterized in that: It includes a cylinder body, a cylinder cover, an oil pressure plate assembly and a pull-rope displacement sensor. The cylinder cover is fixed to the open end of the cylinder body and closes the cylinder body. The oil pressure plate assembly includes an oil pressure plate, a guide rod and a compression spring. The oil pressure plate and the compression spring are both sleeved on the guide rod. The oil pressure plate slides with the guide rod. The two ends of the guide rod are respectively fixed on the cylinder cover and the closed end of the cylinder body. The oil pressure plate slides with the inner wall of the cylinder. The two ends of the compression spring respectively abut on the cylinder cover and the oil pressure plate. The oil pressure plate divides the inner cavity of the cylinder into two cavities. The cavity where the compression spring is located is an air cavity, and the other cavity is a grease cavity. A grease outlet is provided on the closed end of the cylinder body. The main body of the pull-rope displacement sensor is installed on the outside of the cylinder cover. The pull rope passes through the cylinder cover and is connected to the oil pressure plate.

2. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, characterized in that: A sealing ring is arranged on the cylindrical surface of the oil pressure plate and the inner wall of the cylinder in sliding cooperation.

3. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, characterized in that: The fixing points of the guide rod, the cylinder cover and the closed end of the cylinder body are respectively located at the center points of the cylinder cover and the closed end of the cylinder body.

4. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, characterized in that: The grease injection cylinder is provided with multiple grease outlets.

5. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, characterized in that: It also includes a grease overflow valve, which is a one-way valve. The grease overflow valve is installed on the side wall of the grease injection cylinder, and the grease cavity of the grease injection cylinder is communicated with the inlet of the one-way valve.

6. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, characterized in that: A grease filling port is also provided on the closed end of the cylinder or on the side wall of the cylinder near the closed end.

7. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, characterized in that: The cylinder is formed by a tubular shell and a bottom plate fixedly connected, and the bottom plate constitutes the closed end of the cylinder.

8. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, characterized in that: The cross-sectional shape of the cylinder is a rounded rectangle.

9. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that: The oil pressure plate assembly also includes a guide sleeve, which is fixed on the oil pressure plate, and the oil pressure plate is slidably matched with the guide rod through the guide sleeve.

10. The grease injection cylinder capable of automatically detecting the amount of grease as claimed in claim 9, characterized in that: The guide sleeve is a copper guide sleeve.

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