Tool for quickly dismounting oil seal of plunger pump

Abstract

The application relates to a tool for quickly disassembling and assembling an oil seal of a plunger pump, which comprises a hollow cylinder matched with the diameter of a plunger pump piston, sequentially comprising a disassembling part, a middle part and an assembling part from left to right, the outer diameter of the disassembling part and the outer diameter of the assembling part are both smaller than the outer diameter of the middle part, end threads for disassembling the oil seal are arranged on the outer circumferential surface of the disassembling part, a plurality of cutting parts are uniformly arranged on the lowermost two circles of the end threads, the outer diameter of the cutting part is smaller than the outer diameter of the disassembling part, and the cutting parts on the lowermost circle are staggered with the cutting parts on the second circle. According to the technical scheme, the staggered cutting parts arranged on the lowermost two circles of the end threads can prevent the cutting parts from cutting into the side wall of the oil seal groove when the oil seal is disassembled, a tooth-shaped structure is formed, the oil seal is more convenient to disassemble, and the fixed inner cylinder and the claw structure are used, the claw is inserted into the side wall of the oil seal groove through the through hole by rotating the cylinder when the oil seal is disassembled, and the disassembly rate of the oil seal is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of auxiliary tools for air conditioning systems in cigarette factories, and particularly relates to a tool for quickly disassembling and assembling an oil seal of a plunger pump. BACKGROUND

[0002] At present, the air conditioning equipment of a cigarette factory uses a micro-fog humidification method to cool and humidify the production area in summer. The micro-fog humidification is realized by a micro-fog humidifier. The micro-fog humidifier increases the water pressure and atomizes through a specific nozzle to quickly absorb heat from the air to complete vaporization and diffusion, thereby completing humidification and cooling. The micro-fog humidifier mainly realizes pressure increase through a plunger pump. With the extension of the use time, the rubber oil seal of the plunger pump will be aged and deformed, resulting in poor sealing and reduced pressure increase effect. However, because the material of the plunger pump is high-density ceramic, the gap between adjacent parts is small, and it is difficult to directly take out the rubber oil seal for replacement without damaging the plunger.

[0003] Therefore, the applicant proposes a special dismounting and mounting tool for the oil seal, CN208575773U. The outer circumferential surface of the dismounting part is provided with end threads for dismounting the oil seal. When the rubber oil seal is dismounted, the tool is rotated, the threads are wedged into the oil seal groove, and the oil seal is taken out during the dismounting process. This tool indeed improves the efficiency when the rubber oil seal is dismounted and mounted. However, during use, it is found that there are still some deficiencies. Because the overall thickness of the rubber oil seal is not large, the depth of the oil seal groove is smaller. When the tool is used, only one or two threads can be wedged into the oil seal groove, resulting in that the threads cut the wall of the oil seal groove during the taking-out process, and the tool cannot be used. SUMMARY

[0004] The purpose of the present application is to provide a tool for quickly dismounting and mounting the oil seal of the plunger pump to solve the problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] A tool for quickly dismounting and mounting the oil seal of the plunger pump, comprising a hollow column body matched with the diameter of the plunger pump piston, the column body sequentially comprises a dismounting part, an intermediate part and a mounting part from left to right, the outer diameter of the dismounting part and the outer diameter of the mounting part are both smaller than the outer diameter of the intermediate part, the outer circumferential surface of the dismounting part is provided with end threads for dismounting the oil seal, a plurality of cutting parts are uniformly arranged on the lowermost two circles of the end threads, and the outer diameter of the cutting part is smaller than the outer diameter of the dismounting part.

[0007] The cutting parts on the lowermost circle and the cutting parts on the second circle are staggered.

[0008] Further, three cutting parts are evenly arranged on the end thread of the lowermost circle.

[0009] Further, a through hole is arranged on the cutting part of the lowermost circle, and the pawl extends or retracts through the through hole.

[0010] Further, a fixed inner cylinder is arranged in the inner cavity of the column, and is rotatably connected with the column. A slide rail groove is arranged at a position corresponding to the through hole of the fixed inner cylinder, and the depth of the slide rail groove is different. The inner end of the pawl is slidably arranged in the slide rail groove.

[0011] Further, the slide rail groove is composed of three parts, corresponding to the three through holes. Each part of the slide rail groove is composed of a first slide rail groove, a second slide rail groove and a third slide rail groove which are connected smoothly. The depth of the first slide rail groove is smaller than that of the third slide rail groove. The depth of the second slide rail groove is inclined, and gradually increases when moving from the first slide rail groove to the third slide rail groove.

[0012] Further, when the pawl is located at the third slide rail groove, the outermost end of the pawl is located in the side wall of the column.

[0013] Further, a ball bearing is arranged between the inner wall of the column and the outer wall of the fixed inner cylinder.

[0014] Further, an anti-skid sleeve is arranged on the middle part.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] The technical scheme improves the original special tool for disassembling and assembling the oil seal by arranging staggered cutting parts on the lowermost two circles of the end thread. When disassembling the oil seal, especially when turning the column into the oil seal groove, the cutting parts will not cut into the side wall of the oil seal groove, thus forming a tooth-shaped structure, which is more convenient for prying out the oil seal. Through the fixed inner cylinder and the pawl structure, when disassembling the oil seal, the pawl is inserted into the side wall of the oil seal groove through the through hole by rotating the column, thereby improving the combination of the tool and the oil seal groove and improving the prying rate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the tool for quickly disassembling and assembling the oil seal of the column pump.

[0018] Figure 2 It is Figure 1 A-A sectional view.

[0019] Figure 3 It is Figure 2 the enlarged view of B.

[0020] BRIEF DESCRIPTION OF DRAWINGS:

[0021] 1. Disassembly section; 2. Intermediate section; 3. Mounting section; 4. Fixed inner cylinder; 5. Through hole; 6. Cutting section; 7. Claw; 8. Slide rail groove; 9. Claw body; 10. Slider section. Detailed Implementation

[0022] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, and should not be construed as limiting the technical solution of the present invention.

[0023] like Figures 1 to 3 As shown, this application provides a tooling for quick assembly and disassembly of a piston pump oil seal, including a hollow cylinder that matches the diameter of the piston of the piston pump. A fixed inner cylinder is inserted into the cylinder. In the technical solution of this application, the fixed inner cylinder can be a cylindrical structure or a cylindrical structure. A ring of mounting grooves is provided at the corresponding positions of the fixed inner cylinder and the cylinder for installing ball bearings. The cylinder rotates relative to the fixed inner cylinder.

[0024] The column includes a disassembly part 1, a middle part 2, and an installation part 3 from left to right. The outer diameter of the disassembly part and the outer diameter of the installation part are both smaller than the outer diameter of the middle part. The outer circumferential surface of the disassembly part is provided with an end thread for disassembling the oil seal. Here, the end thread refers to the thread provided on the side surface of the column and near the end, rather than the thread provided on the end face. On the bottom two turns of the end thread (which can also be called the leftmost two turns of the end thread), three evenly distributed cutting parts 6 are provided. The outer diameter of the cutting parts is smaller than the outer diameter of the disassembly part and also smaller than the outer diameter of the end thread, so that the two turns of the end thread have a tooth-shaped structure. Moreover, the cutting parts on the two turns of the end thread are staggered to form different wedging parts on the side wall of the oil seal groove.

[0025] In the technical solution of this application, a through hole communicating with the inner cavity of the cylinder is provided on the cutting part of the lowest ring, and the chuck 7 extends or retracts through the through hole. The chuck 7 of this application includes a chuck body 9 and a slider part 10 provided at one end of the chuck body, and the chuck body of this application is triangular in shape, and the through hole on the cutting part that mates with it is also triangular.

[0026] A slide rail groove 8 is provided at the position corresponding to the through hole of the fixed inner cylinder. The slider part of the chuck is located in the slide rail groove, and the slider part rotates in the slide rail groove as the column rotates.

[0027] The sliding rail groove of the application is composed of three parts, corresponding to three through holes respectively, and each part of the sliding rail groove is composed of a first sliding rail groove, a second sliding rail groove and a third sliding rail groove connected smoothly, the groove depth of the first sliding rail groove is less than that of the third sliding rail groove, the groove depth of the second sliding rail groove is inclined, and the groove depth gradually increases when moving from the first sliding rail groove to the third sliding rail groove. When the pawl is located at the third sliding rail groove, the outermost end of the pawl is located in the side wall of the column.

[0028] The fixed inner cylinder of the application passes out of the column at one end of the mounting part of the column, and a transverse through hole 5 is arranged on the fixed inner cylinder, and a fixing pin is inserted to fix the inner cylinder from rotating.

[0029] In the specific use process, when the oil seal is disassembled, the fixing pin is inserted into the through hole of the fixed inner cylinder to prevent the fixed inner cylinder from rotating, then the column is rotated, during the rotation of the column, the end screw is screwed into the oil seal groove, at the same time, the rotation of the column drives the slider part of the pawl to move in the sliding rail groove, from the initial state that the slider part is located in the third sliding rail groove, to the first sliding rail groove through the second sliding rail groove, at this time, because the depth of the sliding rail groove gradually decreases, the outer end part of the pawl is pressed to move outward along the through hole and extend, the extended pawl outer end part is inserted into the oil seal side wall, increasing the wedging degree of the column and the oil seal, and improving the disassembly rate of the oil seal.

[0030] The above only describes the preferred embodiments of the application and is not used to limit the application, and for those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A tool for rapid disassembly of an oil seal of a plunger pump, characterized in that The hollow cylinder matched with the diameter of the plunger pump piston comprises a dismounting part, an intermediate part and a mounting part from left to right, the outer diameter of the dismounting part and the mounting part is smaller than that of the intermediate part, end threads for dismounting oil seal are arranged on the outer circumferential surface of the dismounting part, a plurality of cutting parts are uniformly arranged on the lowermost two circles of end threads, the outer diameter of the cutting part is smaller than that of the dismounting part; The cutting parts on the lowermost circle are staggered with those on the second circle; A through hole communicating with the inner cavity of the cylinder is arranged on the cutting part of the lowermost circle, and the pawl extends or retracts through the through hole; A fixed inner cylinder is further arranged in the inner cavity of the cylinder and is connected with the cylinder in opposite rotation, a circle of slide rail grooves is arranged on the fixed inner cylinder corresponding to the through hole, the inner end of the pawl is slidably arranged in the slide rail groove; The slide rail groove is composed of three parts corresponding to three through holes, each part of the slide rail groove is composed of a first slide rail groove, a second slide rail groove and a third slide rail groove connected smoothly, the groove depth of the first slide rail groove is smaller than that of the third slide rail groove, the groove depth of the second slide rail groove is inclined, and the groove depth gradually increases when moving from the first slide rail groove to the third slide rail groove.

2. The tooling for a quick disconnect plunger pump oil seal of claim 1, wherein, Three cutting parts are uniformly arranged on the end threads of the lowermost circle.

3. The tooling for a quick change plunger pump oil seal of claim 1 wherein, When the pawl is located in the third slide rail groove, the outermost end of the pawl is located in the side wall of the cylinder.

4. The tooling for a quick change plunger pump oil seal of claim 1 wherein, A ball bearing is arranged between the inner wall of the cylinder and the outer wall of the fixed inner cylinder.

5. The tooling for a quick disconnect plunger pump oil seal of claim 1 wherein, An anti-skid sleeve is sleeved on the intermediate part.

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