Single line distributor

Abstract

The present invention discloses a single-line distributor, which is mainly composed of a distributor block, a reset spring, an oil inlet connector, a pressure switch, a reversing switch valve, a one-way connector, a valve core switch oil channel, a valve core switch main oil channel, and a reset spring sleeve. The distributor block is an integral block or is composed of more than one mutually connected and fixed blocks. A through hole is arranged at the left and right axial centers, and through one-way connector holes are symmetrically arranged at the upper and lower edges of the front and rear sides, and the one-way connector holes that are mutually symmetrical at the front and rear are connected; the one-way connector holes are arranged with threaded holes vertically to the through holes, and an oil channel 11A is arranged directly below the threaded holes. The present invention can be conveniently adjusted according to needs to avoid mechanical failures caused by excessive or insufficient lubrication; the mechanical pressure switch is built-in, which reduces the overall external dimensions, has a delicate appearance, is relatively simple and compact in structure, and reduces the occupied space.

Description

Technical Field

[0001] The invention belongs to the field of grease conveying equipment in a centralized lubrication system, in particular to a grease distributor, and more particularly to a single-line distributor. Background Art

[0002] Good lubrication between relatively moving parts is very important. Once the grease cannot reach the lubrication part on time and in a certain amount, dry friction will occur between the moving parts, accelerating the wear between the mating surfaces and causing high temperature effects, which may damage the parts or even cause the equipment to be scrapped. The grease in the centralized lubrication system reaches each lubrication part through the distributor along the pipeline, so the distributor plays a pivotal role in the centralized lubrication system. It distributes the pressure grease delivered by the oil pump according to the amount of oil required by each lubrication point, and requires accurate delivery to the lubrication position.

[0003] Grease is a type of dry oil with poor fluidity. If used in a low-temperature environment, its flow capacity is almost zero. In this sense, the metering accuracy of the distributor directly affects the amount of oil delivered to each lubrication point. Too much or too little oil will affect the service life of equipment parts and driving safety. The sensitivity of the distributor to the opening and closing of each valve during metering and oil pressure is particularly important because it directly affects the accuracy of metering and the pressure added to the system.

[0004] At present, the centralized lubrication system of domestic equipment uses distributors to distribute lubricating oil. The advantage of using distributors is to reduce the complexity of system structure, improve the compactness of the whole system, and can fill multiple lubrication points at the same time. Due to the lack of unified technical standards, most manufacturers ignore the processing accuracy in order to seek manufacturing convenience. The distributor cannot accurately measure the amount of oil injected in each cycle, and it may also cause the distributor to leak oil and the oil outlet to be blocked when in use.

[0005] Nowadays, the oil output of most distributors is equal, which greatly limits the function of the distributor and cannot meet the oil requirements of different lubrication parts. Too much or too little oil will affect the service life of equipment parts and driving safety.

[0006] Grease is greatly affected by environmental factors. Most dispensers on the market cannot deliver grease normally in high temperature, low temperature and high humidity environments, which can easily cause safety accidents. In addition, the dispenser structure is too complicated and the appearance is too large. The maintenance cost has always been high, which consumes a lot of manpower and material resources and is not conducive to the development of national industrial intelligence and automation. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a single-line distributor which has accurate metering, small size and can operate normally in low temperature, high temperature and high humidity environments.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a single-line distributor, mainly composed of a distributor block, a reset spring, an oil inlet connector, a pressure switch, a reversing switch valve, a one-way connector, a valve core switch oil channel, a valve core switch main oil channel, and a reset spring sleeve. The distributor block is an integral block or is composed of more than one blocks connected and fixed to each other. A through hole is provided on its side wall, and a threaded one-way connector or a metering device is provided at the through hole. The one-way connector or the metering device is connected to the oil channel in the block. A through hole is provided at the left and right axial centers of the distributor block; a vertically downward threaded hole is provided at the midline of the two one-way connectors connected in a straight line, and an oil channel 11A is provided directly below the threaded hole; the oil channel 11A is connected to the valve core switch oil channel; the threaded hole The aperture is larger than the diameter of the oil passage 11A; the hexagonal screw plug is threadedly connected to the threaded hole, and its length is larger than the depth of the threaded hole; a metering piston with a convex axial cross-section is arranged in the one-way connector hole, and the left end of the metering piston is a metering piston push rod, and a metering piston return spring is installed between it and the one-way connector; an oil passage 13C connected to the through hole is arranged at the connector hole at the end of the one-way connector; a reversing switch valve is installed in the through hole, and its right side is connected to the return spring, and the return spring is installed in the return spring sleeve, and the return spring sleeve is threadedly connected to the right end of the through hole; the left side of the reversing switch valve is connected to the oil inlet connector; the oil inlet connector is threadedly connected to the through hole; the pressure switch is connected to the main oil passage in the distributor block by being installed on one side of the oil inlet connector, and is arranged parallel to the oil inlet connector.

[0009] The above-mentioned single-line distributor is characterized in that: the metering piston push rod and the inner wall of the one-way connector hole form an outer oil chamber 14D; the inner wall of the one-way connector hole and the left and right metering pistons form an inner oil chamber 12B.

[0010] The aforementioned single-line distributor is characterized in that: the valve core of the reversing switch valve is a long cylinder, a boss connected to the reset spring is arranged at the front end, and an annular oil return groove is evenly distributed on the circumference; a valve core switch main oil channel is axially arranged inside the valve core, the length of the valve core switch main oil channel is greater than the axial length of the return oil groove, and a valve core switch branch oil channel perpendicular to the valve core switch main oil channel is opened on the valve core switch main oil channel; the valve core switch branch oil channel and the oil return groove are staggered; the diameter of the valve core switch branch oil channel is the same as the diameter of the oil channel 11A.

[0011] The above-mentioned single-line distributor is characterized in that the metering piston push rod of the metering piston is set with different lengths, and the volume of the inner oil chamber 12B can be changed by replacing the metering piston push rods of different lengths.

[0012] Unlike general distributors that use rubber sealing rings, the present invention uses materials with low expansion coefficients for precision processing of key parts, and the fits are all clearance fits, which fundamentally solves the problem of lubrication equipment failure caused by environmental factors; solves the problem that the distributor cannot work normally in a low temperature and high humidity environment; the oil output of each oil outlet can be accurately measured, and the displacement can be conveniently adjusted as needed to avoid mechanical failures caused by excessive or insufficient lubrication; the mechanical pressure switch is built-in, reducing the overall external dimensions, with a delicate appearance, a relatively simple and compact structure, and reduced space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the present invention.

[0014] Figure 2 It is a top view of the present invention.

[0015] Figure 3 It is a stereogram of the present invention.

[0016] Figure 4 It is a cross-sectional view of the AA direction oil injection state of the present invention.

[0017] Figure 5 It is a cross-sectional view of the BB oil injection state of the present invention.

[0018] Figure 6 It is a cross-sectional view of the AA direction oil return state of the present invention.

[0019] Figure 7 It is a cross-sectional view of the BB direction oil return state of the present invention.

[0020] Figure 8 It is a schematic diagram of the combined sheet structure of the present invention.

[0021] Fig. 9 It is a cross-sectional view of the combined sheet AA of the present invention in the oil return state.

[0022] Fig.10 It is a cross-sectional view of the combined sheet type BB of the present invention in the oil return state.

[0023] Fig.11 It is a cross-sectional view of the combined sheet AA of the present invention in the oil injection state.

[0024] Fig.12 It is a cross-sectional view of the combined sheet type BB of the present invention in the oil injection state.

[0025] Fig.13It is a cross-sectional view of the structure of the combined plate type reversing valve of the present invention.

[0026] Fig.14 It is a schematic diagram of the plug-in structure of the present invention.

[0027] Fig.15 It is a cross-sectional view of the plug-in AA of the present invention in the oil return state.

[0028] Fig.16 It is a cross-sectional view of the plug-in BB of the present invention in the oil return state.

[0029] Fig.17 It is a cross-sectional view of the plug-in AA of the present invention in the oil filling state.

[0030] Fig.18 It is a cross-sectional view of the plug-in BB of the present invention in the oil injection state.

[0031] Fig.19 It is a cross-sectional view of the plug-in metering device of the present invention.

[0032] 1. Distributor block, 2. Pressure switch, 3. Oil inlet connector, 4. Reversing switch valve, 5. One-way connector, 6. Reset spring sleeve, 7. Reset spring, 8. Through hole, 9. One-way connector hole, 10. One-way connector hole 11. Threaded hole, 11A, Oil channel, 12. Hexagonal screw plug, 12B, Inner oil chamber, 13C, Oil channel, 14D, Outer oil chamber, 15, Metering piston reset spring, 16, Metering piston, 17, Valve core switch main oil channel, 18, Valve core switch oil channel, 19, Metering piston Plug push rod, 20, one-way valve seat, 21, steel ball, 22, spring, 23, oil return groove, 24, front piece, 25, front piece reversing valve, 26, middle piece, 27, middle piece reversing valve, 28, floating shaft reversing valve, 29, rear piece, 30, rear piece reversing valve, 31, anti-rotation piece, 32, spring washer, 33, reset spring sleeve, 34, reset spring, 35, valve core switch main oil channel, 36, valve core switch oil channel, 37, oil return groove, 38, sealing ring, 39, isolation plug, 40, oil return channel 1. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding and description of the technical solution of the present invention, the left and right directions of the drawings are described as left and right, the direction perpendicular to the drawings is described as the front, and the reverse is described as the rear, the horizontal direction of the drawings is described as the axial direction, and the vertical direction of the drawings is described as the longitudinal direction.

[0034] Example 1

[0035] Figure 1-Figure 7The distributor block of the present invention is a preferred embodiment of an integral type, which shows a single-line distributor, which is mainly composed of a distributor block, a reset spring, an oil inlet connector, a pressure switch, a reversing switch valve, a one-way connector, a valve core switch oil channel, a valve core switch main oil channel, and a reset spring sleeve. The distributor block is an integral block or is composed of more than one blocks connected and fixed to each other, and a through hole is provided on its side wall, and a threaded one-way connector or a metering device is provided at the through hole, and the one-way connector or the metering device is connected to the oil channel in the block. A through hole is provided at the left and right axial centers of the distributor block; a vertically downward threaded hole is provided at the midline of the two one-way connectors connected in a straight line, and an oil channel 11A is provided directly below the threaded hole; the oil channel 11A is connected to the valve core switch oil channel; the threaded The aperture of the hole is larger than the diameter of the oil passage 11A; the hexagonal screw plug is threadedly connected to the threaded hole, and its length is larger than the depth of the threaded hole; a metering piston with a convex axial cross-section is arranged in the hole of the one-way connector, and the left end of the metering piston is a metering piston push rod, and a metering piston return spring is installed between it and the one-way connector; an oil passage 13C connected to the through hole is arranged at the connector hole at the end of the one-way connector; a reversing switch valve is installed in the through hole, and its right side is connected to the return spring, and the return spring is installed in the return spring sleeve, and the return spring sleeve is threadedly connected to the right end of the through hole; the left side of the reversing switch valve is connected to the oil inlet connector; the oil inlet connector is threadedly connected to the through hole; the pressure switch is connected to the main oil passage in the distributor block by being installed on one side of the oil inlet connector, and is arranged parallel to the oil inlet connector.

[0036] The above-mentioned single-line distributor is characterized in that: the metering piston push rod and the inner wall of the one-way connector hole form an outer oil chamber 14D; the inner wall of the one-way connector hole and the left and right metering pistons form an inner oil chamber 12B.

[0037] The aforementioned single-line distributor is characterized in that: the valve core of the reversing switch valve is a long cylinder, a boss connected to the reset spring is arranged at the front end, and an annular oil return groove is evenly distributed on the circumference; a valve core switch main oil channel is axially arranged inside the valve core, the length of the valve core switch main oil channel is greater than the axial length of the return oil groove, and a valve core switch branch oil channel perpendicular to the valve core switch main oil channel is opened on the valve core switch main oil channel; the valve core switch branch oil channel and the oil return groove are staggered; the diameter of the valve core switch branch oil channel is the same as the diameter of the oil channel 11A.

[0038] The above-mentioned single-line distributor is characterized in that the metering piston push rod of the metering piston is set with different lengths, and the volume of the inner oil chamber 12B can be changed by replacing the metering piston push rods of different lengths.

[0039] Example 2

[0040] Figures 8 to 13The distributor block of the present invention is a preferred embodiment of a combined plate type, which shows a distributor block of a single-line distributor, which is composed of more than one mutually connected and fixed blocks, and mutually matched and fixed positioning pins and positioning grooves are arranged between two adjacent blocks, and the front and rear ends of the two blocks are respectively provided with a front plate and a rear plate; the front plate and the rear plate are provided with step-surface through holes at the axis of the front plate and the rear plate, which are respectively used to install the oil inlet connector and the reset spring sleeve; a plate-type reversing switch valve is installed in the through hole, and the plate-type reversing switch valve is sequentially composed of a front plate reversing valve, a middle plate reversing valve, a rear plate reversing valve, and a floating shaft reversing valve from left to right, and the outer wall of the aforementioned valve body is provided with an oil return groove and a valve core switch oil distribution channel connected to each block; flanges are provided at the ends of the front plate reversing valve and the floating shaft reversing valve, and the floating shaft reversing valve is placed on the inner walls of the middle plate reversing valve and the rear plate reversing valve, and is provided with a sealing ring; the front plate reversing valve is a one-way valve.

[0041] Example 3

[0042] Figure 13 to Figure 17 The distributor block of the present invention is a preferred embodiment of the plug-in type, which shows that the side walls of the distributor block of the single-line distributor are provided with fine through holes with stepped surfaces, and an axial through hole for installing a reversing valve is opened; the oil distribution channel of the reversing valve is connected to the fine through hole, and a metering device connected by a thread is installed on the step surface of the fine through hole; the metering device is composed of a metering piston, an isolation plug, and a piston cylinder body, and the piston cylinder body is a cylinder. A metering piston return spring is provided at the bottom of the metering piston and installed inside the piston cylinder body, and a sealing ring is installed at the bottom and top of the isolation plug , and is installed on the inner wall of the bottom of the piston cylinder, and an oil channel 11A connected with the fine through hole is arranged at its axis; the bottom end of the isolation plug is smaller than the diameter of the top end, and its contact with the bottom of the piston cylinder body forms an inclined transition to the inner axis; the contact position between the inclined surface and the bottom end of the isolation plug is a horizontal platform; the inner wall of the piston cylinder is parallel to the movement direction of the metering piston and is provided with an oil return channel 13C; the end face of the metering piston and the top of the isolation plug form an oil chamber 12B, and the inclined surface of the isolation plug and the step surface of the fine through hole on the block constitute an oil return chamber; the oil return chamber is provided with an oil return channel 1 connected with the reversing valve.

[0043] Working process:

[0044] 1. When the lubrication pump is started, high-pressure grease is injected into the oil inlet 1 of the single-line distributor through the oil pipe. Under the action of high-pressure grease, the switch valve core moves in the direction of the reset spring, and the reset spring is compressed. After moving a certain distance, the one-way valve of the switch valve is opened, and the grease is injected into the inner 12B oil chamber of the metering piston through the 17 valve core switch main oil channel-18 valve core switch branch oil channel-11A oil channel, pushing the 16 metering piston to move outward. The amount of oil required for the oil filling point is determined by the distance the metering piston moves. The piston stroke can be constrained by changing the length of the 19 metering piston push rod, and the volume of the 12B oil chamber can be accurately controlled to control the oil volume. The 15 reset spring is compressed. After all the metering pistons are in place, the system pressure increases. When the pressure reaches the value set by the pressure switch, the 2 pressure switch is activated and the lubrication pump stops working.

[0045] 2. After the lubrication pump stops working, the pressure in the oil pipe drops. Under the action of the 7 return spring, the 4 reversing switch valve moves toward the oil inlet. When it is in place, the inner side of the 16 metering piston -12B cavity is connected with the oil passage -11A and the -23 oil return groove -13C oil passage on the switch valve core. Under the action of the 15 metering piston return spring, the grease at 12B on the inner side of the 16 metering valve core enters the outer oil chamber 14D on the outside of the 16 metering piston through the 11A oil passage -23 oil return groove -13C oil passage, and the 16 metering piston is reset.

[0046] 3. When the lubrication pump is started again, high-pressure grease is injected into the 3 oil inlet connector of the single-line distributor through the oil delivery pipe. Under the action of high-pressure grease, the 4 reversing switch valve moves in the direction of the 7 return spring, and the 7 return spring is compressed. After moving a certain distance, the oil channel 13C is closed, and the one-way valve of the 4 reversing switch valve is opened. The grease is injected into the 12B oil channel inside the 16 metering piston through the 17 valve core switch main oil channel-18 valve core switch oil channel-11A oil channel, pushing the 16 metering piston to move outward, and the 7 return spring is compressed. At the same time, the grease in the 14D oil chamber outside the 16 metering piston is discharged through the 5 one-way connector. Quantitative delivery to the lubrication point, each time the lubrication pump is started, the grease is quantitatively injected into the lubrication point to meet the lubrication of the lubrication part.

[0047] Unlike general distributors that use rubber sealing rings, the key parts of the present invention are all finely processed using materials with low expansion coefficients, and the fits are all clearance fits, which fundamentally solves the problem of lubrication equipment failures caused by environmental factors; the distributor has a simple and compact structure and a small appearance; the metering structure is scientifically and reasonably designed, which improves the accuracy of metering; the distributor can operate stably for a long time in harsh environments without manual maintenance.

[0048] In addition, the structure of the present invention can adjust the combination form of the blocks or the number of one-way connectors at any time according to the usage conditions, and has a wide range of uses.

[0049] The similar products and functions described above are extensions of the present invention and should be protected.

Claims

1. Single-line distributor, mainly composed of distributor block, reset spring, oil inlet connector, pressure switch, reversing switch valve, one-way connector, hexagonal screw plug, valve core switch oil channel, valve core switch main oil channel, reset spring sleeve, characterized by: The distributor block is an integral block or is composed of more than one mutually connected and fixed blocks, and a through hole is arranged on its side wall, and a threaded one-way connector or metering device is arranged at the through hole, and the one-way connector or metering device is connected to the oil channel in the block. A through hole is arranged at the left and right axial centers of the distributor block; a vertical downward threaded hole is arranged at the midline of the two one-way connectors connected in a straight line, and an oil channel 11A is arranged directly below the threaded hole; the oil channel 11A is connected to the valve core switch oil channel; the aperture of the threaded hole is larger than the diameter of the oil channel 11A; the hexagonal screw plug is threadedly connected to the threaded hole, and the length is larger than The depth of the threaded hole is determined by the following steps: a metering piston with a convex axial cross-section is arranged in the one-way connector hole, the left end of the metering piston is a metering piston push rod, and a metering piston reset spring is installed between the metering piston and the one-way connector; an oil passage 13C connected to the through hole is arranged at the connector hole at the end of the one-way connector; a reversing switch valve is installed in the through hole, and its right side is connected to the reset spring, and the reset spring is installed in the reset spring sleeve, and the reset spring sleeve is threadedly connected to the right end of the through hole; the left side of the reversing switch valve is connected to the oil inlet connector; the oil inlet connector is threadedly connected to the through hole; the pressure switch is connected to the oil inlet connector by installing it on one side of the oil inlet connector. The main oil passage in the distributor block is connected and arranged in parallel with the oil inlet connector; the distributor block of the single-line distributor is composed of more than one block, and a positioning pin and a positioning groove that cooperate and fix with each other are arranged between two adjacent blocks, and the front and rear ends of the two blocks are respectively provided with a front plate and a rear plate; the axis of the front plate and the rear plate are provided with a through hole with a step surface, which is used to install the oil inlet connector and the reset spring sleeve respectively; the through hole is installed with a plate-type reversing switch valve, and the plate-type reversing switch valve is sequentially arranged from left to right as a front plate reversing valve, a middle plate reversing valve, a rear plate reversing valve, and a floating shaft reversing valve, and the outer wall of the aforementioned valve body is provided with an oil return groove and a reversing groove connected to each block The oil distribution channel of the valve core switch connected to the body; the side walls of the distributor block of the single-line distributor are provided with fine through holes with stepped surfaces, and a through hole for installing the reversing valve is opened axially; the oil distribution channel of the reversing valve is connected to the fine through hole, and a metering device connected by a thread is installed at the step surface of the fine through hole; the metering device is composed of a metering piston, an isolation plug, and a piston cylinder body, the piston cylinder body is a cylinder, and a metering piston return spring is provided at the bottom of the metering piston and installed inside the piston cylinder body, the bottom and top ends of the isolation plug are installed with sealing rings, and are installed on the inner wall of the bottom of the piston cylinder, and an oil channel 11A connected to the fine through hole is provided at the axis thereof.

2. The single-line distributor according to claim 1, characterized in that: The metering piston push rod and the inner wall of the one-way connector hole form an outer oil chamber 14D; the inner wall of the one-way connector hole and the left and right metering pistons form an inner oil chamber 12B.

3. The single-line distributor according to claim 1, characterized in that: The valve core of the reversing switch valve is a long cylinder, with a boss connected to a reset spring at the front end and annular oil return grooves evenly distributed on the circumference; a valve core switch main oil channel is axially arranged inside the valve core, the length of the valve core switch main oil channel is greater than the axial length of the oil return groove, and a valve core switch sub-oil channel perpendicular to the valve core switch main oil channel is opened on the valve core switch main oil channel.

4. The single-line distributor according to claim 3, characterized in that: The valve core switch oil passage and the oil return groove are staggeredly distributed; the diameter of the valve core switch oil passage is the same as the diameter of the oil passage 11A.

5. The single-line distributor according to claim 1, characterized in that: The metering piston push rod of the metering piston is set with different lengths. By replacing the metering piston push rods of different lengths, the volume of the inner oil chamber 12B can be changed.

6. The single-line distributor according to claim 1, characterized in that: The ends of the front plate reversing valve and the floating shaft reversing valve are provided with flanges, and the floating shaft reversing valve is placed on the inner walls of the middle plate reversing valve and the rear plate reversing valve and is provided with a sealing ring.

7. The single-line distributor according to claim 6, characterized in that: The front plate reversing valve is a one-way valve.

8. The single-line distributor according to claim 1, characterized in that: The bottom end of the isolation plug is smaller in diameter than the top end, and the contact point between the bottom end of the isolation plug and the piston cylinder body forms an inclined surface transition toward the inner axis; the contact point between the inclined surface and the bottom end of the isolation plug is a horizontal surface.

9. The single-line distributor according to claim 1, characterized in that: The inner wall of the piston cylinder is provided with an oil return passage 13C parallel to the movement direction of the metering piston; the end face of the metering piston and the top end of the isolation plug form an oil chamber 12B, and the inclined surface of the isolation plug and the step surface of the fine through hole on the block constitute the oil return chamber; the oil return chamber is provided with an oil return passage 1 connected to the reversing valve.

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