A protective structure for a pneumatic dry oil pump

Abstract

This utility model provides a protective structure for a pneumatic dry oil pump, including an air pump and a plunger oil pump located at the bottom of the air pump. A connecting plate is fixedly installed near the bottom of the plunger oil pump. An anti-dry-running component is slidably disposed at the bottom of the connecting plate to prevent the air pump and plunger oil pump from running dry. The anti-dry-running component includes a sealing block assembly slidably disposed at the bottom of the connecting plate, an automatic control component positioned between the connecting plate and the sealing block assembly to drive the sealing block assembly to seal the oil inlet at the bottom of the plunger oil pump, and a manual control component located on the side of the connecting plate to manually drive the sealing block assembly to seal or open the oil inlet at the bottom of the plunger oil pump. This utility model effectively prevents the dry oil pump from running dry for extended periods when there is no oil in the tank, thus preventing wear of the pump's seals and ultimately damage to the dry oil pump.

Description

Technical Field

[0001] This utility model relates to the field of lubrication technology for bearing housings between rolling mills, and in particular to a pneumatic dry oil pump protection structure. Background Technology

[0002] A dry oil pump uses air as its power source to deliver lubricating oil from a tank to the application site. When there is oil in the tank, the dry oil pump pumps oil into the pipeline. The pressure of the oil pumped into the pipeline can be adjusted and maintained according to the air pressure. Once the pressure is reached, the dry oil pump stops working. When there is no oil in the tank, the pressure cannot be built up, causing the dry oil pump to run dry for an extended period. This wears down the pump's seals and ultimately damages the pump. Utility Model Content

[0003] In order to solve the technical problem in the prior art that when there is no oil in the oil tank, the dry oil pump runs dry for a long time, which leads to wear of the dry oil pump seals and eventually damage to the dry oil pump, this utility model provides a pneumatic dry oil pump protection structure.

[0004] The pneumatic dry oil pump protection structure provided by this utility model adopts the following technical solution:

[0005] A pneumatic dry oil pump protection structure includes an air pump and a plunger oil pump disposed at the bottom of the air pump. A connecting plate is fixedly installed near the bottom of the plunger oil pump. An anti-dry-running component is slidably disposed at the bottom of the connecting plate to prevent the air pump and the plunger oil pump from running dry. The anti-dry-running component includes a sealing block assembly slidably disposed at the bottom of the connecting plate, an automatic control component disposed between the connecting plate and the sealing block assembly to drive the sealing block assembly to seal the bottom oil inlet of the plunger oil pump, and a manual control component disposed on the side of the connecting plate to manually drive the sealing block assembly to seal or open the bottom oil inlet of the plunger oil pump.

[0006] By adopting the above technical solution: the air pump drives the plunger oil pump to perform oil suction. When there is no lubricating oil in the oil tank, the automatic control component drives the sealing block assembly to seal the oil inlet at the bottom of the plunger oil pump. The manual control component can be manually operated to drive the sealing block assembly to seal or open the oil inlet at the bottom of the plunger oil pump.

[0007] Furthermore, the sealing block assembly includes a first sealing block and a second sealing block, which are connected to the bottom wall of the plunger oil pump.

[0008] By adopting the above technical solution: when there is no lubricating oil in the oil tank, the first sealing block and the second sealing block move close to each other to seal the oil inlet at the bottom of the plunger oil pump.

[0009] Furthermore, the upper part of the first sealing block has a sealing plane, which is connected to the bottom wall of the plunger oil pump. The first sealing block has a flow guiding slope on the side near the axis of the plunger oil pump, and multiple exhaust holes are evenly distributed on the flow guiding slope.

[0010] By adopting the above technical solution: the oil inlet at the bottom of the plunger oil pump can be sealed by the sealing plane. During use, the exhaust hole allows air to pass through. However, due to the high density of the lubricating oil, the lubricating oil is blocked on the surface of the exhaust hole and generates a thrust on the guide slope, causing the first sealing block to move away from the axis of the plunger oil pump. Through the guiding effect of the guide slope, the lubricating oil enters the interior of the plunger oil pump.

[0011] Furthermore, there are two automatic control components, which are symmetrically arranged on both sides of the sealing block assembly and connected to the first sealing block and the second sealing block respectively.

[0012] By adopting the above technical solution, two automatic control components are set up to enable the first sealing block and the second sealing block to operate synchronously.

[0013] Furthermore, the automatic control component includes a slide rail fixedly mounted on the bottom of the connecting plate, the top of the first sealing block forming a sliding connection with the slide rail, and a connecting shaft also being provided on the top of the first sealing block, the connecting shaft extending outward after passing through the side wall of the slide rail; it also includes a spring fixedly mounted inside the slide rail, the spring being sleeved on the outside of the connecting shaft, one end of the spring being fixedly connected to the side wall of the connecting shaft, and the other end being fixedly connected to the side wall of the slide rail.

[0014] By adopting the above technical solution, the first sealing block can move towards the axis of the plunger oil pump under the elastic force of the spring.

[0015] Furthermore, the difference between the second sealing block and the first sealing block is that the second sealing block has a connecting groove through it on its side, while the first sealing block has a connecting block that mates with the connecting groove on its side.

[0016] By adopting the above technical solution, the connecting block is embedded inside the connecting groove, so that the first sealing block and the second sealing block form a sliding connection.

[0017] Furthermore, the manual control component includes a first toothed plate and a second toothed plate slidably disposed at the bottom of the connecting plate. The first toothed plate and the second toothed plate are respectively fixedly connected to the connecting shaft in the first sealing block and the second sealing block. A gear is disposed between the first toothed plate and the second toothed plate to drive the first toothed plate and the second toothed plate to move synchronously.

[0018] By adopting the above technical solution, the gear can drive the first gear plate and the second gear plate to move synchronously. The first gear plate and the second gear plate drive the first sealing block and the second sealing block to slide at the bottom of the connecting plate through the connecting shaft, thereby sealing or opening the oil inlet of the plunger oil pump.

[0019] Furthermore, the gear is provided with a control lever, which extends upward after passing through the connecting plate, and a knob is bolted to the end of the control lever.

[0020] By adopting the above technical solution, the gear can be rotated by turning the knob, thereby causing the first sealing block and the second sealing block to slide at the bottom of the connecting plate, sealing or opening the oil inlet of the plunger oil pump.

[0021] In summary, the beneficial effects of this utility model are as follows:

[0022] This invention utilizes an anti-dry-firing assembly. In use, first rotating the knob in the manual control assembly moves the first and second sealing blocks away from the plunger pump's axis, opening the oil inlet at the bottom of the plunger pump. Then, the plunger pump is placed in the oil tank, and the air pump is activated to add oil. Due to the resistance of the lubricating oil in the tank, the first and second sealing blocks remain on either side of the oil inlet at the bottom of the plunger pump. The lubricating oil is guided by the guide ramp and enters the oil inlet at the bottom of the plunger pump. When there is no lubricating oil in the oil tank, the air drawn in by the plunger pump flows out through the exhaust port. At this time, there is no resistance between the first sealing block and the second sealing block. Under the action of the spring, the first sealing block and the second sealing block move towards the axis of the plunger pump, sealing the oil inlet at the bottom of the plunger pump. This stops the air pump and the internal workings of the plunger pump from operating. This structure effectively prevents the dry oil pump from running dry for a long time when there is no oil in the oil tank, which would cause the seals of the dry oil pump to wear and eventually damage the dry oil pump. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0025] Figure 3 This utility model Figure 2 Enlarged view of part A in the middle;

[0026] Figure 4 This is an exploded view of the present invention;

[0027] Figure 5 This utility model Figure 4 Enlarged view of part B in the middle.

[0028] In the diagram: 1. Air pump; 2. Piston oil pump; 3. Connecting plate; 4. Anti-dry-firing assembly; 5. Sealing block assembly; 6. Automatic control assembly; 7. Manual control assembly; 51. First sealing block; 52. Second sealing block; 61. Slide rail; 63. Spring; 71. First toothed plate; 72. Second toothed plate; 73. Gear; 74. Control lever; 75. Knob; 511. Sealing plane; 512. Guide slope; 513. Connecting shaft; 514. Connecting block; 515. Exhaust port; 521. Connecting groove. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0030] Reference Figures 1-3 As shown, this utility model discloses a pneumatic dry oil pump protection structure, including an air pump 1 and a plunger oil pump 2 disposed at the bottom of the air pump 1. During use, the air pump 1 drives the plunger oil pump 2 to perform an oil suction action. It also includes an anti-dry-running component 4 to prevent the air pump 1 and plunger oil pump 2 from dry-running when there is no oil in the oil tank. Specifically, a connecting plate 3 is fixedly installed near the bottom of the plunger oil pump 2, and an anti-dry-running component 4 is slidably disposed at the bottom of the connecting plate 3 to seal the bottom oil inlet of the plunger oil pump 2. The anti-dry-running component 4 includes a sealing block assembly 5 slidably disposed at the bottom of the connecting plate 3. The sealing block assembly 5 includes a first sealing block 51 and a second sealing block 52, which are connected to the bottom wall of the plunger oil pump 2. When there is no lubricating oil in the oil tank, the first sealing block 51 and the second sealing block 52 move closer to each other to seal the bottom oil inlet of the plunger oil pump 2. It also includes an automatic control assembly 6 disposed between the connecting plate 3 and the sealing block assembly 5 to drive the sealing block assembly 5 to seal the bottom oil inlet of the plunger oil pump 2; and a manual control assembly 7 disposed on the side of the connecting plate 3 to manually drive the sealing block assembly 5 to seal or open the bottom oil inlet of the plunger oil pump 2.

[0031] Specifically, refer to Figure 4 and Figure 5 As shown, the first sealing block 51 has a sealing plane 511 on its upper part, which is connected to the bottom wall of the plunger pump 2. The first sealing block 51 has a guide slope 512 on the side near the axis of the plunger pump 2. Multiple exhaust holes 515 are evenly distributed on the guide slope 512. The exhaust holes 515 allow air to pass through, but due to the high density of the lubricating oil, the lubricating oil blocks the surface of the exhaust holes 515 and generates a thrust on the guide slope 512, causing the first sealing block 51 to move away from the axis of the plunger pump 2. Through the guiding effect of the guide slope 512, the lubricating oil enters the interior of the plunger pump 2.

[0032] Reference Figure 3 As shown, there are two automatic control components 6, which are symmetrically arranged on both sides of the sealing block assembly 5 and connected to the first sealing block 51 and the second sealing block 52, respectively. Each automatic control component 6 includes a slide rail 61 fixedly mounted at the bottom of the connecting plate 3. The top of the first sealing block 51 is slidably connected to the slide rail 61. A connecting shaft 513 is also provided at the top of the first sealing block 51, extending outward after passing through the side wall of the slide rail 61. It also includes a spring 63 fixedly mounted inside the slide rail 61, sleeved on the outside of the connecting shaft 513. One end of the spring 63 is fixedly connected to the side wall of the connecting shaft 513, and the other end is fixedly connected to the side wall of the slide rail 61. Under the elastic force of the spring 63, the first sealing block 51 can move towards the axis of the plunger pump 2.

[0033] The difference between the second sealing block 52 and the first sealing block 51 is that a connecting groove 521 is provided through the side of the second sealing block 52, and a connecting block 514 that mates with the connecting groove 521 is provided on the side of the first sealing block 51. In use, the connecting block 514 is embedded into the connecting groove 521, so that the first sealing block 51 and the second sealing block 52 form a sliding connection. The remaining structure of the second sealing block 52 and its connection method with the automatic control component 6 are the same as those of the first sealing block 51, and will not be repeated here. When there is no lubricating oil in the oil tank, the plunger oil pump 2 draws air into the space between the first sealing block 51 and the second sealing block 52, and the air flows out through the exhaust port 515. At this time, there is no resistance from the lubricating oil between the first sealing block 51 and the second sealing block 52. Under the elastic force of the spring 63 in the automatic control component 6, the first sealing block 51 and the second sealing block 52 move towards the axis of the plunger oil pump 2, sealing the oil inlet at the bottom of the plunger oil pump 2. This stops the internal movement of the air pump 1 and the plunger oil pump 2, preventing the dry oil pump from running dry for a long time when there is no oil in the oil tank, which would cause wear on the seals of the dry oil pump and eventually damage the dry oil pump.

[0034] Reference Figure 2 and Figure 3As shown, the manual control component 7 includes a first toothed plate 71 and a second toothed plate 72 slidably disposed at the bottom of the connecting plate 3. The first toothed plate 71 and the second toothed plate 72 are respectively fixedly connected to the connecting shaft 513 in the first sealing block 51 and the second sealing block 52. A gear 73 is disposed between the first toothed plate 71 and the second toothed plate 72 to drive the first toothed plate 71 and the second toothed plate 72 to move synchronously. A control rod 74 is disposed on the gear 73. The control rod 74 extends upward after passing through the connecting plate 3, and a knob 75 is bolted to the end of the control rod 74. In use, rotating the knob 75 can drive the gear 73 to rotate. The gear 73 drives the first toothed plate 71 and the second toothed plate 72 to move synchronously. The first toothed plate 71 and the second toothed plate 72 drive the first sealing block 51 and the second sealing block 52 to slide at the bottom of the connecting plate 3 through the connecting shaft 513, thereby sealing or opening the oil inlet of the plunger oil pump 2.

[0035] In use, this invention first involves rotating the knob 75 in the manual control assembly 7 to open the oil inlet at the bottom of the plunger oil pump 2. Specifically, rotating the knob 75 causes the gear 73 to drive the first toothed plate 71 and the second toothed plate 72 to move synchronously. The first toothed plate 71 and the second toothed plate 72 drive the first sealing block 51 and the second sealing block 52 to move away from the axis of the plunger oil pump 2, thus opening the oil inlet at the bottom of the plunger oil pump 2. Then, the plunger oil pump 2 is placed in the oil tank, and the air pump 1 is turned on to add oil. Under the resistance of the lubricating oil in the oil tank, the first sealing block 51 and the second sealing block 52 remain on both sides of the oil inlet at the bottom of the plunger oil pump 2, allowing the lubricating oil to flow smoothly. After being guided by the guide slope 512, the air enters the bottom oil inlet of the plunger oil pump 2. When there is no lubricating oil in the oil tank, the air sucked in by the plunger oil pump 2 flows out through the exhaust hole 515. At this time, there is no resistance between the first sealing block 51 and the second sealing block 52. Under the elastic force of the spring 63, the first sealing block 51 and the second sealing block 52 move towards the axis of the plunger oil pump 2 to seal the bottom oil inlet of the plunger oil pump 2, so that the air pump 1 and the plunger oil pump 2 stop operating. This structure effectively prevents the dry oil pump from running dry for a long time when there is no oil in the oil tank, which would cause the seals of the dry oil pump to wear and eventually damage the dry oil pump.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic dry oil pump protection structure comprising an air pump (1) and a plunger oil pump (2) arranged at the bottom of the air pump (1), characterized in that, A connecting plate (3) is fixedly installed near the bottom of the plunger oil pump (2). An anti-dry-running assembly (4) is slidably arranged at the bottom of the connecting plate (3) to prevent the air pump (1) and the plunger oil pump (2) from running dry. The anti-dry-running assembly (4) includes a sealing block assembly (5) slidably arranged at the bottom of the connecting plate (3), an automatic control assembly (6) arranged between the connecting plate (3) and the sealing block assembly (5) to drive the sealing block assembly (5) to seal the bottom oil inlet of the plunger oil pump (2), and a manual control assembly (7) arranged on the side of the connecting plate (3) to manually drive the sealing block assembly (5) to seal or open the bottom oil inlet of the plunger oil pump (2).

2. The protection structure of a pneumatic dry pump according to claim 1, wherein, The sealing block assembly (5) includes a first sealing block (51) and a second sealing block (52), which are connected to the bottom wall of the plunger oil pump (2).

3. A gas dynamic dry pump protection structure according to claim 2, characterized in that The first sealing block (51) has a sealing plane (511) on its upper part. The sealing plane (511) is connected to the bottom wall of the plunger oil pump (2). The first sealing block (51) has a guide slope (512) on the side near the axis of the plunger oil pump (2). Multiple exhaust holes (515) are evenly distributed on the guide slope (512).

4. The gas dynamic dry pump protection structure according to claim 3, wherein The number of automatic control components (6) is two. The two automatic control components (6) are symmetrically arranged on both sides of the sealing block assembly (5) and are respectively connected to the first sealing block (51) and the second sealing block (52).

5. A gas dynamic dry pump protection structure according to claim 4, characterized in that The automatic control component (6) includes a slide rail (61) fixedly installed at the bottom of the connecting plate (3), the top of the first sealing block (51) is slidably connected to the slide rail (61), and a connecting shaft (513) is also provided at the top of the first sealing block (51). The connecting shaft (513) extends outward after passing through the side wall of the slide rail (61). It also includes a spring (63) fixedly installed inside the slide rail (61). The spring (63) is sleeved on the outside of the connecting shaft (513). One end of the spring (63) is fixedly connected to the side wall of the connecting shaft (513), and the other end is fixedly connected to the side wall of the slide rail (61).

6. The pneumatic dry oil pump protection structure according to claim 5, characterized in that, The difference between the second sealing block (52) and the first sealing block (51) is that a connecting groove (521) is provided through the side of the second sealing block (52), and a connecting block (514) that cooperates with the connecting groove (521) is provided on the side of the first sealing block (51).

7. A gas dynamic dry pump protection structure according to claim 6, characterized in that The manual control component (7) includes a first toothed plate (71) and a second toothed plate (72) slidably disposed at the bottom of the connecting plate (3). The first toothed plate (71) and the second toothed plate (72) are fixedly connected to the connecting shaft (513) in the first sealing block (51) and the second sealing block (52), respectively. A gear (73) is provided between the first toothed plate (71) and the second toothed plate (72) to drive the first toothed plate (71) and the second toothed plate (72) to move synchronously.

8. The gas dynamic dry pump protection structure of claim 7, wherein, A control lever (74) is provided on the gear (73). The control lever (74) extends upward after passing through the connecting plate (3). A knob (75) is bolted to the end of the control lever (74).

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