CN211009984U

CN211009984U - Piston of reversing valve

Info

Publication number: CN211009984U
Application number: CN201921650401.6U
Authority: CN
Inventors: 冯玉梅; 任思国; 刘倩; 贾忠; 陈荣
Original assignee: Shandong Donghua Cement Corp ltd
Current assignee: Shandong Donghua Cement Corp ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-14
Anticipated expiration: 2029-09-30

Abstract

A piston of a reversing valve belongs to the technical field of reversing valves. The method is characterized in that: including piston bush and valve rod (2), the both ends of piston bush all are provided with input hole (101), the middle part of piston bush is provided with delivery port (301), valve rod (2) and piston bush clearance fit, input hole (101) at piston bush both ends all are linked together with delivery port (301), the both ends of valve rod (2) all are provided with and are used for input hole (101) confined sealing part (201) that will correspond the side, valve rod (2) slide to set up in the piston bush, and seal input hole (101) at both ends in turn. The piston of the reversing valve is matched with the valve body, so that the actions of absorbing waste oil and discharging the waste oil are realized, the absorbed waste oil flows to the output hole through the gap between the valve rod and the piston sleeve and is discharged through the output hole, and the actions of reversing and discharging the waste oil are simultaneously completed.

Description

Piston of reversing valve

Technical Field

A piston of a reversing valve belongs to the technical field of reversing valves.

Background

The bearing is an important part in mechanical equipment, most of the bearings are lubricated by lubricating grease, and the lubricating grease is usually pressed into a cavity of a bearing seat or added onto a rolling element track of the bearing through a grease adding hole on the bearing seat in both manual grease adding and mechanical grease adding.

In actual use, a part of bearing seats are not provided with grease discharging ports, and grease cannot be discharged after the cavity of the bearing seat is filled with the grease, so that even if some bearing seats are provided with grease discharging holes, the grease is discharged by gravity self-flowing or extruded after the cavity is filled with the grease. When the cavity of the bearing seat is filled with the lubricating grease, the bearing can generate heat due to poor heat dissipation; the lubricating grease filled in the cavity of the bearing seat can be hardened and even carbonized after being discharged for a long time in a high-temperature environment, so that the supplement of new grease to the parts of the bearing needing to be lubricated is influenced; after the bearing seat cavity is filled with the lubricating grease, the lubricating grease is extruded out from the sealing position of the shaft and the bearing seat along with the continuous filling of new grease, so that the environment is polluted, and a sealing element is damaged; the used grease on the bearing usually contains a small amount of metal debris, and the grease cannot be removed in time and can be reused, so that the wear of the bearing is increased, and the service life of the bearing is influenced.

For the reasons mentioned above, it is common to arrange to open the bearing housing, remove dirty grease, clean the bearing, and inject new grease during equipment maintenance. Due to the coordination of the maintenance time and the production time, the use problem of the bearing cannot be thoroughly solved through maintenance in the actual production activity, and frequent grease injection and waste grease removal actions are required for the bearing seat. The waste grease discharging is usually completed by adopting negative pressure suction, the sucked waste grease is required to be discharged by the reversing valve during reversing, and the existing reversing valve cannot meet the requirements.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, and the piston of the reversing valve can suck out waste grease while the valve rod moves, and can finish reversing of grease injection and waste grease discharge.

The utility model provides a technical scheme that its technical problem adopted is: the piston of the reversing valve is characterized in that: including piston sleeve and valve rod, the both ends of piston sleeve all are provided with the input hole, and the middle part of piston sleeve is provided with the delivery outlet, valve rod and piston sleeve clearance fit, and the input hole at piston sleeve both ends all is linked together with the delivery outlet, and the both ends of valve rod all are provided with and are used for corresponding the input hole confined sealing portion of side, and the valve rod slides and sets up in the piston sleeve to seal the input hole at both ends in turn.

Preferably, the piston sleeve comprises a sleeve and valve cylinders symmetrically arranged at two ends of the sleeve, the sleeve is a cylinder with two open ends, the valve cylinders are connected with the sleeve and close corresponding ends of the sleeve, the input holes are formed in the valve cylinders on the corresponding sides, and the valve rods are arranged in the sleeve and in clearance fit with the sleeve.

Preferably, the valve cylinder is a cylinder with one closed end, and the valve cylinder is coaxially sleeved outside one end corresponding to the sleeve and is in threaded connection with the sleeve.

Preferably, a positioning pin is arranged between the valve cylinder and the sleeve, and the positioning pin is arranged along the radial direction of the sleeve.

Preferably, both ends of the piston sleeve are tapered, the diameter of the taper gradually increases from the end part to the middle part, and a plurality of input holes are uniformly distributed at intervals around the central line of each end of the piston sleeve.

Preferably, the output hole is arranged in a plurality at intervals around the central line of the piston sleeve.

Preferably, the sealing part is a cone with the diameter gradually increasing from the end part to the middle part, and the two ends of the inner cavity of the piston sleeve are cones matched with the sealing parts on the corresponding sides.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

1. the valve rod of the piston of the reversing valve can slide in the piston sleeve and alternatively seals the input holes at the two ends of the piston sleeve, so that the input holes at the two ends of the piston sleeve are sequentially connected with the output hole and are matched with the valve body, the actions of absorbing waste oil and discharging the waste oil are realized, the absorbed waste oil flows to the output hole through the gap between the valve rod and the piston sleeve and is discharged through the output hole, and the actions of reversing and discharging the waste oil are simultaneously completed.

2. The sleeve is in threaded connection with the valve barrel, so that the valve barrel is convenient to disassemble and assemble, and the piston is convenient to overhaul.

3. The locating pin can avoid relative rotation between sleeve and the valve barrel, avoids causing the hindrance to the work of valve rod, has avoided again between sleeve and the valve barrel not hard up.

4. The both ends of piston cover are the toper, avoid the valve body to seal the input hole, and the input hole encircles the central line interval equipartition of piston cover has a plurality ofly, and is quick more smooth and easy when guaranteeing to absorb the grease.

5. The output hole encircles the piston cover and is provided with a plurality ofly, makes waste oil fat discharge fast, has improved waste oil fat's discharge rate.

6. The sealing part is conical, so that the sealing part can ensure that the input hole on the corresponding side is more reliably sealed, and further ensures that waste oil is extracted and discharged.

Drawings

FIG. 1 is a schematic front cross-sectional view of a piston of the reversing valve.

Fig. 2 is a schematic left side view of the piston of the reversing valve.

Fig. 3 is a schematic sectional view in the direction of a-a in fig. 1.

Fig. 4 is a schematic cross-sectional view taken along the direction B-B in fig. 1.

FIG. 5 is a front cross-sectional schematic view of the reversing valve.

In the figure: 1. the oil-gas mixing valve comprises a valve cylinder 101, an input hole 2, a valve rod 201, a sealing part 3, a sleeve 301, an output hole 4, a positioning pin 5, a push rod 6, a valve core 7, a sealing spring 8, a valve body 801, an oil inlet hole 802 and an oil discharge hole.

Detailed Description

Fig. 1 to 5 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 5.

The utility model provides a piston of switching-over valve, includes piston bush and valve rod 2, the both ends of piston bush all are provided with input hole 101, the middle part of piston bush is provided with delivery outlet 301, valve rod 2 and piston bush clearance fit, the input hole 101 at piston bush both ends all is linked together with delivery outlet 301, the both ends of valve rod 2 all are provided with and are used for corresponding the input hole 101 confined sealing 201 of side, valve rod 2 slides and sets up in the piston bush to seal the input hole 101 at both ends in turn. The valve rod 2 of the piston of the reversing valve can slide in the piston sleeve and alternatively seals the input holes 101 at the two ends of the piston sleeve, so that the input holes 101 at the two ends of the piston sleeve are sequentially connected with the output hole 301 and are matched with the piston sleeve, the actions of absorbing waste oil and discharging the waste oil are realized, the absorbed waste oil flows to the output hole through the gap between the valve rod 2 and the piston sleeve and is discharged through the output hole 301, and the actions of reversing and discharging the waste oil are simultaneously completed.

The present invention is further described with reference to specific embodiments, however, it will be understood by those skilled in the art that the detailed description given herein with respect to the drawings is for better explanation and that the present invention is necessarily to be construed as limited to those embodiments, and equivalents or common means thereof will not be described in detail but will fall within the scope of the present application.

Specifically, the method comprises the following steps: as shown in FIGS. 1-4: the piston sleeve comprises a sleeve 3 and a valve barrel 1, the sleeve 3 is a cylinder with two open ends, the valve barrel 1 is a cylinder with one closed end, and the valve barrel 1 is coaxially sleeved outside one end corresponding to the sleeve 3. The outer wall of the two ends surrounding the sleeve 3 is provided with threads, the inner wall surrounding the valve barrel 1 is provided with threads, and the valve barrel 1 is in threaded connection with one end corresponding to the sleeve 3, so that the valve barrel 1 and the sleeve 3 are convenient to disassemble and assemble, and the piston of the reversing valve is convenient to overhaul.

Input hole 101 sets up on the valve section of thick bamboo 1 that corresponds the side, the blind end of valve section of thick bamboo 1 is for following the frustum form that the direction diameter that is close to the opening end increases gradually, input hole 101 encircles the axis interval equipartition of the frustum of valve section of thick bamboo 1 has a plurality ofly, in this embodiment, all be provided with four input hole 101 on every valve section of thick bamboo 1, can enough avoid when cooperating with

valve body

8, 8 inner walls of valve body seal input hole 101, can guarantee again that waste grease can be quick enter into in the piston bush and discharge outlet 301. A radial positioning pin 4 is arranged between the end part of the sleeve 3 and the valve cylinder 1 on the corresponding side, so that the sleeve 3 and the valve cylinder 1 can be prevented from rotating relatively, and looseness between the sleeve 3 and the valve cylinder 1 is caused.

Output hole 301 sets up in the middle part of sleeve 3, and output hole 301 encircles the axis interval of sleeve 3 and is provided with a plurality ofly, and in this embodiment, output hole 301 encircles the axis interval equipartition of sleeve 3 and has four groups, and every output hole 301 of group all includes the three of the axis interval equipartition along sleeve 3 to can discharge waste oil fat fast.

Valve rod 2 slides and sets up in sleeve 3, and

valve rod

2 and 3 clearance fit of sleeve, and valve rod 2 sets up with 3 inner wall intervals of sleeve promptly, and input hole 101 is linked together through passageway and delivery outlet 301 between valve rod 2 and the sleeve 3 to the discharge of waste oil fat has been realized.

The both ends of valve rod 2 all are provided with the toper sealing 201 that becomes big gradually by tip to middle part diameter, and valve section of thick bamboo 1 inner chamber is for the toper with sealing 201 matched with to can guarantee that valve rod 2 is more reliable with the closure of input hole 101. The valve rod 2 can only completely seal the input hole 101 on one valve cylinder 1 at a time, namely when the sealing part 201 at one end of the valve rod 2 seals the input hole 101 at the corresponding side, the input hole 101 at the other end is communicated with the output hole 301, so that waste grease is respectively sucked out from two ends and is discharged through the same output hole 301.

As shown in fig. 5: the utility model also provides a reversing valve, including foretell piston and valve body 8, be provided with cylindric valve pocket in the valve body 8, the piston slides and sets up in the valve pocket of valve body 8, and piston and valve pocket sliding connection of valve body 8, and input hole 101 is linked together with one side that the valve pocket corresponds.

Both ends of the valve body 8 are provided with push rods 5, the push rods 5 are coaxially arranged with the piston, the push rods 5 slide and are hermetically connected with the valve body 8, one end of each push rod 5 is attached to or connected with the valve barrel 1 of the corresponding end of the piston, the other end of each push rod extends out of the valve body 8, and the push rods 5 at both ends can push the piston to axially move in the valve body 8.

Oil inlet holes 801 are symmetrically formed in two sides of the upper portion of the valve body 8, an oil discharge hole 802 is formed in the lower side of the middle of the valve body 8, and the oil inlet holes 801 and the oil discharge hole 802 are communicated with the valve cavity. A check valve is arranged in each oil inlet hole 801, so that waste oil enters the valve cavity. Because the valve body 8 is sleeved outside the sleeve 3, a communicating cavity arranged around the piston sleeve is formed between the middle part of the piston sleeve and the inner cavity of the valve body 8, the oil discharge hole 802 is always communicated with the communicating cavity in the process that the piston sleeve axially moves in the valve body 8, and the output hole 301 is communicated with the communicating cavity, so that waste oil and fat are discharged through the oil discharge hole 802.

The check valve comprises a valve core 6 and a sealing spring 7, the diameter of the middle part of each oil inlet hole 801 is larger than the diameters of the two ends to form an installation part, the valve core 6 is arranged in the installation part, the diameter of the middle part of the valve core 6 is larger than the diameters of the two ends to form a sealing part, the sealing spring 7 is sleeved on the valve core 6 on the lower side of the sealing part, the sealing spring 7 is in a compression state, the lower end of the sealing spring 7 is supported on a valve body 8, and the upper end of the sealing spring pushes the valve core 6 to move upwards through the sealing part and.

The upper portion of sealing is the toper that from top to bottom diameter crescent, and the top of installation department is the toper with the upper portion matched with of sealing to guarantee that case 6 is more reliable to the closure of inlet port 801, and then guaranteed to be exhausted the grease by the valve inslot completely.

When the reversing valve is used, firstly, grease is injected into the valve cavity of the valve body 8, when the piston sleeve is pushed by the push rod 5 to move towards the right side, because the grease is arranged in the valve cavity and the piston sleeve, the grease enables the valve rod 2 to be static relative to the valve body 8, and the valve rod 2 moves leftwards relative to the piston sleeve until the valve rod 2 is attached to the left end of the piston sleeve, the input hole 101 at the left end of the piston sleeve is sealed, and the input hole 101 at the right end of the piston sleeve is opened at the moment.

In the process that the piston sleeve moves rightwards, the pressure in the valve cavity on the right side of the piston is increased, the valve core 6 on the right side seals the oil inlet hole 801 on the right side, meanwhile, grease on the right side of the valve cavity enters the piston sleeve through the input hole 101, enters the communicating cavity through the output hole 301, and is finally discharged through the oil discharge hole 802. And the pressure in the cavity on the left side of the piston is reduced to form negative pressure, the valve core 6 on the left side opens the oil inlet hole 801 on the left side, and meanwhile, under the action of the negative pressure, waste oil is sucked into the valve cavity on the right side of the piston sleeve and is discharged through the oil discharge hole 802 in the process of pushing the piston sleeve to move leftwards.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A piston for a reversing valve, comprising: including piston bush and valve rod (2), the both ends of piston bush all are provided with input hole (101), the middle part of piston bush is provided with delivery port (301), valve rod (2) and piston bush clearance fit, input hole (101) at piston bush both ends all are linked together with delivery port (301), the both ends of valve rod (2) all are provided with and are used for input hole (101) confined sealing part (201) that will correspond the side, valve rod (2) slide to set up in the piston bush, and seal input hole (101) at both ends in turn.

2. The piston of the reversing valve of claim 1, wherein: the piston sleeve comprises a sleeve (3) and valve cylinders (1) symmetrically arranged at two ends of the sleeve (3), the sleeve (3) is a cylinder with two open ends, the valve cylinders (1) are connected with the sleeve (3) and seal one corresponding end of the sleeve, an input hole (101) is formed in the valve cylinder (1) on the corresponding side, and a valve rod (2) is arranged in the sleeve (3) and is in clearance fit with the sleeve.

3. The piston of the reversing valve of claim 2, wherein: the valve cylinder (1) is a cylinder with one closed end, and the valve cylinder (1) is coaxially sleeved outside one end corresponding to the sleeve (3) and is in threaded connection with the sleeve (3).

4. A piston for a reversing valve according to claim 2 or 3, characterized in that: a positioning pin (4) is arranged between the valve cylinder (1) and the sleeve (3), and the positioning pin (4) is arranged along the radial direction of the sleeve (3).

5. The piston of the reversing valve of claim 1, wherein: the both ends of piston cover be the toper that the diameter grow gradually from tip to middle part, each end of piston cover all encircles its central line interval equipartition and has a plurality of input holes (101).

6. The piston of the reversing valve of claim 1, wherein: the output holes (301) are arranged in a plurality at intervals around the central line of the piston sleeve.

7. The piston of the reversing valve of claim 1, wherein: the sealing part (201) is a cone with the diameter gradually increased from the end part to the middle part, and the two ends of the inner cavity of the piston sleeve are cones matched with the sealing part (201) on the corresponding side.