CN221170925U - Pressure-adjustable pressure maintaining valve - Google Patents
Pressure-adjustable pressure maintaining valve Download PDFInfo
- Publication number
- CN221170925U CN221170925U CN202323043097.8U CN202323043097U CN221170925U CN 221170925 U CN221170925 U CN 221170925U CN 202323043097 U CN202323043097 U CN 202323043097U CN 221170925 U CN221170925 U CN 221170925U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- valve core
- pipeline
- linear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009295 sperm incapacitation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Safety Valves (AREA)
Abstract
The utility model provides a pressure-adjustable pressure holding valve, which belongs to the technical field of coalbed methane gathering and transportation pipe network systems and comprises an upper valve seat, a lower valve seat, a spring, a valve core barrel, an adjusting screw and a top cover; the upper valve seat comprises a linear pipeline I; the lower valve seat comprises a linear pipeline II and an S-shaped curve pipeline which is vertically communicated with the linear pipeline II; the S-shaped curve pipeline comprises a low inlet section and a high outlet section; the bottom end of the linear pipeline II is positioned at the intersection of the lower inlet section and the higher section; the linear pipeline I and the linear pipeline II are spliced to form a valve core cavity; the valve core cylinder is arranged in the valve core cavity and forms a sealing surface with the raised section; the top surface of the linear pipeline I is provided with a threaded hole; the adjusting screw penetrates through the threaded hole; the top cover is arranged in the valve core cavity and is opposite to the valve core cylinder, and the top surface of the top cover is tightly propped up by the adjusting screw; two ends of the spring are respectively connected with the top cover and the valve core cylinder. The utility model can effectively improve the working state of the pressure maintaining valve, improve and adjust the opening pressure of the pressure maintaining valve and eliminate the aging failure risk of the pressure maintaining valve.
Description
Technical Field
The utility model belongs to the technical field of coal bed gas gathering and transportation pipe network systems, and particularly discloses a pressure-adjustable pressure maintaining valve.
Background
The high and low pressure sides of the compressor are not established with enough high and low pressure differences, so that the situations of incapacitation of the compressor, insufficient oil supply of the compressor and the like are caused, and the compressor is seriously damaged. If the forced oil supply mode of the oil pump is adopted, besides the large increase of the unit cost, the reliability of the unit is greatly influenced by the reliability of the oil seal and the motor of the oil pump because the oil pump is a moving part, and the pressurized oil supply mode of the oil pump is adopted, so that a great hidden danger is left for the reliability of the unit.
In order to solve the defects of unsmooth loading of a compressor and poor system caused by insufficient high-low pressure difference in the prior art, a pressure maintaining valve is arranged in a unit, after the compressor is started, enough high-low pressure difference is quickly established in a short time, the minimum safe oil pressure supply requirement of the compressor is met, after the pressure exceeds a set value, the pressure maintaining valve is opened, the smooth loading of the compressor is further ensured, the serious faults caused by oil loss or poor oil supply of the compressor are avoided, meanwhile, the flow rate of gas flowing through an oil-gas separator can be reduced, the oil-gas separation effect is ensured, the oil-gas separator is protected from being damaged due to overlarge pressure difference, and the reliability of the unit system is improved. The pressure maintaining valve has the function of a check valve, and can rapidly cut off the connection between the compressor and the exhaust pipeline when the compressor is stopped, so that high-pressure gas is prevented from flowing back into the compressor, and the reverse rotation of the compressor is effectively avoided. Each compressor corresponds to one pressure maintaining valve, or a plurality of compressors are connected in parallel and then share one pressure maintaining valve. The pressure maintaining valve can enable the compressor to adapt to the change requirement of the system load at any time, the power consumption of the compressor can be greatly reduced, meanwhile, compared with a traditional unit, the unit with the pressure maintaining valve does not need any special processing technology, the cost is lower, the reliability is higher, and the running cost of the unit is not increased.
The pressure maintaining valve is one of important parts of the compressor, and can be kept in a good state all the time, so that the service life of the supercharger can be prolonged. However, as the running time becomes longer, the springs in the pressure maintaining valve are aged to different degrees, the opening pressure of the pressure maintaining valve becomes smaller, the exhaust pressure of the host is smaller than or equal to the pressure of the pipe network, and the pressurized gas cannot enter the main pipe network, so that the gas compression and the stable running of the compressor are not facilitated. The pressure maintaining valve is required to be maintained in a good state at all times by improving the adjustability, stability and durability of the pressure maintaining valve, so that the safe operation of the compressor is ensured, and the service life of the compressor is prolonged.
Disclosure of utility model
The utility model provides a pressure-adjustable pressure maintaining valve, which solves the problem of ageing and invalidating of a spring in the pressure maintaining valve, can effectively improve the working state of the pressure maintaining valve, prolongs the service life of the pressure maintaining valve and improves the gas transmission efficiency of a compressor.
The pressure-adjustable pressure maintaining valve comprises an upper valve seat, a lower valve seat, a spring, a valve core barrel, an adjusting screw and a top cover; the upper valve seat comprises a linear pipeline I; the lower valve seat comprises a linear pipeline II and an S-shaped curve pipeline which is vertically communicated with the linear pipeline II; the S-shaped curve pipeline comprises a low inlet section and a high outlet section; the bottom end of the linear pipeline II is positioned at the intersection of the lower inlet section and the higher section; the linear pipeline I and the linear pipeline II are spliced to form a valve core cavity; the valve core cylinder is arranged in the valve core cavity and forms a sealing surface with the raised section; the top surface of the linear pipeline I is provided with a threaded hole; the adjusting screw penetrates through the threaded hole; the top cover is arranged in the valve core cavity and is opposite to the valve core cylinder, and the top surface of the top cover is tightly propped up by the adjusting screw; two ends of the spring are respectively connected with the top cover and the valve core cylinder.
Further, the top surface of the linear pipeline I is provided with a limit groove; the top cover is connected with the limit groove in a sliding way.
Further, the top cover comprises a connecting column and a limiting end plate arranged on the top surface of the connecting column; the diameter of the limiting end plate is larger than that of the connecting column, the limiting end plate is connected with the limiting groove in a sliding mode, and the spring is wound outside the connecting column.
Further, the bottom end of the linear pipeline I is positioned in the linear pipeline II, and the inner wall is in sealing connection with the valve core barrel through a U-shaped sealing ring; the valve core cylinder is filled with lubricating oil, and the top end of the valve core cylinder is positioned above the U-shaped sealing ring.
Further, the upper valve seat also comprises a flange I arranged outside the linear pipeline I; the lower valve seat also comprises a flange II arranged outside the linear pipeline II; the flange I and the flange II are connected through bolts.
Further, the flange I and the flange II are sealed through a flange O-shaped ring.
Further, the lower valve seat also comprises flanges III arranged at two ends of the S-shaped curve pipeline.
Further, the depth of the limiting groove is 5mm; the adjusting screw is a black steel 8.8-grade M14 x 30 screw with a tooth distance of 1.5mm.
Compared with the prior art, the utility model has the following beneficial effects:
1) The height of the top cover is adjusted by rotating the adjusting screw, so that the working length of the spring is shortened, the working stress of the spring is increased, the opening pressure of the pressure maintaining valve is improved, the working state of the pressure maintaining valve is effectively improved, the service life of the pressure maintaining valve is prolonged, the gas transmission efficiency of compression equipment is improved, the coal bed gas is ensured to be safely transmitted, and the device has the characteristics of good practical effect, short maintenance period and low cost;
2) The application realizes the opening pressure adjusting function of the pressure maintaining valve, the arrangement of the fine pitch and high-strength adjusting screw ensures the accuracy and stability of adjustment, and the top cover matched with the adjusting screw has high processing precision and has the characteristics of tightness and smoothness;
3) According to the application, in the operation process of the supercharger, the opening pressure adjustment of the pressure maintaining valve can be realized, and the operation of equipment is not influenced;
in conclusion, the application can effectively improve the working state of the pressure maintaining valve, improve and adjust the opening pressure of the pressure maintaining valve, eliminate the aging failure risk of the pressure maintaining valve and provide a firm guarantee for the safe operation of the coalbed methane gathering and transportation pipe network system.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a pressure-adjustable pressure retention valve (upper and lower valve seats separated);
FIG. 2 is another angular view of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2;
Fig. 4 is a schematic view of the connection of the adjustment screw and the top cover of fig. 1 and 3.
Wherein: 1-upper valve seat; 2-a lower valve seat; 3-a spring; 4-a valve core cylinder; 5-adjusting screws; 6-top cover; 7-U type sealing washer.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
The embodiment provides a pressure-adjustable pressure holding valve, which comprises an upper valve seat 1, a lower valve seat 2, a spring 3, a valve core barrel 4, an adjusting screw 5 and a top cover 6; the upper valve seat 1 comprises a straight pipeline I; the lower valve seat 2 comprises a linear pipeline II and an S-shaped curve pipeline which is vertically communicated with the linear pipeline II; the S-shaped curve pipeline comprises a low inlet section and a high outlet section; the bottom end of the linear pipeline II is positioned at the intersection of the lower inlet section and the higher section; the linear pipeline I and the linear pipeline II are spliced to form a valve core cavity; the valve core cylinder 4 is arranged in the valve core cavity and forms a sealing surface with the raised section; the top surface of the linear pipeline I is provided with a threaded hole; the adjusting screw 5 penetrates through the threaded hole; the top cover 6 is arranged in the valve core cavity, is opposite to the valve core barrel 4, and is tightly propped against the top surface by the adjusting screw 5; the two ends of the spring 3 are respectively connected with the top cover 6 and the valve core barrel 5.
Further, the top surface of the linear pipeline I is provided with a limit groove; the top cover 6 is in sliding connection with the limit groove, and the moving direction and distance of the top cover 6 are limited.
Further, the top cover 6 comprises a connecting column and a limiting end plate arranged on the top surface of the connecting column; the diameter of the limiting end plate is larger than that of the connecting column, the limiting end plate is connected with the limiting groove in a sliding mode, and the spring 3 is wound outside the connecting column.
Further, the bottom end of the linear pipeline I is positioned in the linear pipeline II, and the inner wall is in sealing connection with the valve core barrel through three U-shaped sealing rings 7; the valve core cylinder 4 is filled with lubricating oil, plays a role in oil seal and lubrication, and the top end of the valve core cylinder is positioned above the U-shaped sealing ring 7, and is sealed through the U-shaped sealing ring 7, so that flowing medium is prevented from leaking from a gap at the contact position of the upper valve seat 1 and the valve core cylinder 4.
Further, the upper valve seat 1 also comprises a flange I arranged outside the linear pipeline I; the lower valve seat 2 also comprises a flange II arranged outside the linear pipeline II; the flange I and the flange II are connected through bolts, so that connection of the upper valve seat and the lower valve seat is realized.
Further, the flange I and the flange II are sealed through a flange O-shaped ring.
Further, the lower valve seat 2 further comprises flanges III arranged at two ends of the S-shaped curve pipeline for connecting the unit.
Example 2
In production, a pressure maintaining valve of a tin-free plate 0217 type supercharger fails, so that the flow rate of an air outlet of a unit is 0, after the pressure maintaining valve is disassembled, the aging and softening of a spring element in the pressure maintaining valve are found, the force required for pushing a valve core barrel open to deform a spring is reduced, the opening pressure of the pressure maintaining valve is reduced, the exhaust pressure of a host is less than or equal to the pressure of a pipe network, and pressurized gas cannot enter the main pipe network. According to the working principle of the pressure maintaining valve, an adjusting screw 5 and a top cover 6 are additionally arranged on the original pressure maintaining valve for upgrading and reforming so as to reduce the working length of the spring, increase the working stress of the spring, improve the opening pressure of the pressure maintaining valve, and carry out multiple tests, wherein the test data are as follows.
Through experimental data, the depth (namely, the adjustment stroke) of the limit groove is 5mm, when the thickness of the limit end plate of the top cover 6 is 1.5mm, the exhaust pressure of the host is closest to a normal value, the load of the host is in a normal range, and the exhaust pressure of the host is appropriately higher than the normal value, so that the gas transmission efficiency is improved.
The top cover 6 is manufactured by using vernier caliper measurement and CAD drawing according to the operation task, each piece of dimension data is obtained through multiple tests, the numerical control lathe has high processing precision, the numerical control lathe has the characteristics of tightness and smoothness, the thickness of a limiting end plate of the top cover 6 is determined to be 1.5mm, and the rigidity and the durability of the limiting end plate are ensured.
The arrangement of the adjusting screw 5 on the pressure-retaining valve achieves the opening pressure adjusting function of the pressure-retaining valve. After reaming is carried out on the small hole on the top surface of the upper valve seat 1 of the pressure maintaining valve, a tap M14 x 1.5 is used for sleeving and buckling, the fine tooth distance of 1.5mm is more convenient for accurate adjustment, and a screw M14 x 30 fine tooth 8.8 level screw is matched, so that the screw strength is ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (8)
1. A pressure-adjustable pressure maintaining valve comprises an upper valve seat, a lower valve seat, a spring and a valve core barrel;
The upper valve seat comprises a linear pipeline I;
the lower valve seat comprises a linear pipeline II and an S-shaped curve pipeline which is vertically communicated with the linear pipeline II;
the S-shaped curve pipeline comprises a low inlet section and an high outlet section;
the bottom end of the linear pipeline II is positioned at the intersection of the lower inlet section and the higher section;
The linear pipeline I and the linear pipeline II are spliced to form a valve core cavity;
the valve core cylinder is arranged in the valve core cavity and forms a sealing surface with the raised section;
the device is characterized in that a threaded hole is formed in the top surface of the linear pipeline I;
the pressure-adjustable pressure maintaining valve further comprises an adjusting screw and a top cover;
The adjusting screw penetrates through the threaded hole;
The top cover is arranged in the valve core cavity, is opposite to the valve core barrel, and is tightly propped against the top surface by an adjusting screw;
and two ends of the spring are respectively connected with the top cover and the valve core cylinder.
2. The pressure-adjustable pressure maintaining valve according to claim 1, wherein the top surface of the straight pipeline i is provided with a limit groove;
The top cover is connected with the limit groove in a sliding mode.
3. The pressure-adjustable pressure retention valve of claim 2, wherein the top cover comprises a connecting post and a limiting end plate disposed on a top surface of the connecting post;
The diameter of the limiting end plate is larger than that of the connecting column, the limiting end plate is connected with the limiting groove in a sliding mode, and the spring is wound outside the connecting column.
4. A pressure-adjustable pressure-maintaining valve according to any one of claims 1 to 3, wherein the bottom end of the linear pipe i is located in the linear pipe ii, and the inner wall is in sealing connection with the valve core barrel through a U-shaped sealing ring;
the valve core cylinder is filled with lubricating oil, and the top end of the valve core cylinder is positioned above the U-shaped sealing ring.
5. The pressure-adjustable pressure retention valve of claim 4, wherein the upper valve seat further comprises a flange i disposed outside the linear conduit i;
the lower valve seat also comprises a flange II arranged outside the linear pipeline II;
the flange I and the flange II are connected through bolts.
6. The pressure-adjustable pressure retention valve of claim 5, wherein the flange i and the flange ii are sealed by a flange O-ring.
7. The pressure-adjustable pressure retention valve of claim 6, wherein the lower valve seat further comprises flanges iii disposed at opposite ends of the S-curve conduit.
8. The pressure-adjustable pressure retention valve of claim 7, wherein the limiting groove has a depth of 5mm;
the adjusting screw is a black steel 8.8-grade M14 x 30 screw with a tooth distance of 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323043097.8U CN221170925U (en) | 2023-11-10 | 2023-11-10 | Pressure-adjustable pressure maintaining valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323043097.8U CN221170925U (en) | 2023-11-10 | 2023-11-10 | Pressure-adjustable pressure maintaining valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221170925U true CN221170925U (en) | 2024-06-18 |
Family
ID=91459811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323043097.8U Active CN221170925U (en) | 2023-11-10 | 2023-11-10 | Pressure-adjustable pressure maintaining valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221170925U (en) |
-
2023
- 2023-11-10 CN CN202323043097.8U patent/CN221170925U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104712867A (en) | Pressure self-adaptation end face seal device for water pressure test of steel pipe | |
| CN107061834B (en) | Built-in driving axial-flow type regulating valve | |
| CN221170925U (en) | Pressure-adjustable pressure maintaining valve | |
| CN110594457A (en) | High-pressure large-caliber energy-saving double-plate check valve | |
| CN2846908Y (en) | Piston electrohydraulic valve for digital control | |
| CN104180030A (en) | High-pressure zero-leakage linear sealing check valve | |
| CN111219513A (en) | One-level axial flow pressure reducing valve | |
| CN210770333U (en) | Sand prevention gate valve | |
| CN100455823C (en) | Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force | |
| CN209892802U (en) | Pipeline welding type axial flow check valve | |
| CN102032931B (en) | Valve-type-V-cone throttling device for measuring operation flow of petroleum and gas extraction and transportation | |
| CN220792190U (en) | Multistage pressure limiting valve | |
| CN219975437U (en) | Ball valve with better sealing performance | |
| CN216976107U (en) | Spigot-and-socket type pipeline sealing interface with stepless change compression ratio | |
| CN216951831U (en) | Gravity check valve applied to vertical pipeline | |
| CN220523361U (en) | Small-sized one-way valve device | |
| RU2447343C2 (en) | Locking device | |
| CN215172564U (en) | Ultrahigh pressure reducing valve | |
| CN219954286U (en) | Top-mounted ball valve with transmission mounting structure | |
| CN114935026B (en) | Experimental valve for measuring valve force value, measuring method thereof and one-way valve | |
| CN217440198U (en) | A adapter tool for Size3 type ICU test | |
| CN220668430U (en) | High-pressure sliding seal gate valve | |
| CN214577606U (en) | Air compressor machine piston that new energy automobile used | |
| CN218992363U (en) | High-pressure regulating valve with good sealing performance | |
| CN215568344U (en) | Lever pressure reducing valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |