CN209839259U - Spring adjusting mechanism of reset safety valve - Google Patents
Spring adjusting mechanism of reset safety valve Download PDFInfo
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- CN209839259U CN209839259U CN201920629911.9U CN201920629911U CN209839259U CN 209839259 U CN209839259 U CN 209839259U CN 201920629911 U CN201920629911 U CN 201920629911U CN 209839259 U CN209839259 U CN 209839259U
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- pressure regulating
- spring top
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- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 230000001105 regulatory effect Effects 0.000 claims abstract description 45
- 210000001503 joint Anatomy 0.000 claims description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model provides a relief valve spring guiding mechanism resets. It has solved current technical problem. This relief valve spring guiding mechanism resets, including the relief valve body, relief valve body lateral part be equipped with pressure regulating spring, its characterized in that, the relief valve body include valve body, well valve body, lower valve body, pressure regulating spring's upper end support and lean on in last spring roof, pressure regulating spring's lower extreme support and lean on in lower spring roof, last spring roof and last valve body clearance fit, the upper end of going up spring roof and pressure regulating spring between be equipped with locking structure, lower spring roof and well valve body clearance fit, lower spring roof and relief valve body between still be equipped with the clearance adjustment structure. The utility model has the advantages of the difficult side torsional deformation of pressure regulating spring during the pressure regulating.
Description
Technical Field
The utility model belongs to the technical field of oil drilling equipment, especially, relate to a relief valve spring guiding mechanism resets.
Background
The safety valve of the current drilling pump mainly has two structures of a shear type safety valve and a spring reset type safety valve, wherein the working principle of the spring reset type safety valve is as follows: high-pressure slurry at a slurry inlet acts on the lower end face of the piston, then pressure is transmitted to the two load springs through a connecting rod, a crank and other parts on the upper portion of the safety valve, the force of the high-pressure slurry acting on the piston is balanced with the force of the load springs acting on the crank, and the safety valve is in a normal working (non-open-flow) state. When the mud pressure rises to a certain value, the balance state of the crank sliding block mechanism is damaged due to the stressed compression of the load spring, so that the mud inlet and the mud outlet on the piston are communicated to realize open flow. The pressure regulating spring of the existing reset safety valve is easy to cause deformation such as side torsion of the spring when being compressed by factors such as stress, and the like, thereby influencing the service life of the spring and the stress fluctuation of a tripping point of the safety valve.
In response to this problem, research and study have been conducted in long-term production and life practice, for example, chinese utility model patent discloses a reset safety valve [ application No.: 200920282859.0] including having the valve body of export and import the import and the export of valve body are provided with the joint respectively the valve body in be provided with and be used for intercommunication or relation the piston of import and export connects a valve cap in the upper end of valve body the valve cap in be provided with the connecting rod and a handle that resets that has the balance function, the lower extreme and the piston of connecting rod be connected, the upper end of connecting rod with the short arm of handle that resets connect, set up compression spring at the long arm lower extreme of handle that resets compression spring's both ends still be provided with the adjusting bolt of an adjusting spring deflection. The utility model discloses the operating pressure of system is set for through adjustment preset pressure to the relief valve, compares with shear pin formula relief valve, and the precision obviously improves.
The solution described above improves to some extent some of the problems of the prior art, but it also has at least the following drawbacks: the pressure regulating spring is easy to be twisted and deformed during pressure regulation, and the service life and the stress fluctuation of the tripping point of the safety valve are influenced.
Disclosure of Invention
The utility model aims at the above-mentioned problem, provide a relief valve spring guiding mechanism that resets that the difficult side torsional deformation of pressure regulating spring during pressure regulating.
In order to achieve the above purpose, the utility model adopts the following technical proposal: this relief valve spring guiding mechanism resets, including the relief valve body, relief valve body lateral part be equipped with pressure regulating spring, its characterized in that, the relief valve body include valve body, well valve body, lower valve body, pressure regulating spring's upper end support and lean on in last spring roof, pressure regulating spring's lower extreme support and lean on in lower spring roof, last spring roof and last valve body clearance fit, the upper end of going up spring roof and pressure regulating spring between be equipped with locking structure, lower spring roof and well valve body clearance fit, lower spring roof and relief valve body between still be equipped with the clearance adjustment structure. The upper spring top plate is in clearance fit with the upper valve body, and the lower spring top plate is in clearance fit with the middle valve body, so that the upper spring top plate and the lower spring top plate have a trace amount of movable space relative to the safety valve body, and the pressure regulating spring is prevented from deforming due to lateral torsion when the lower spring top plate and the upper spring top plate regulate pressure through the locking structure; the gap size of the upper spring top plate and the gap size of the lower spring top plate relative to the safety valve body can be changed through the gap adjusting structure, and the control range is enlarged.
In the above-mentioned reset safety valve spring adjusting mechanism, the gap adjusting structure includes a tension bolt disposed in the lower spring top plate, the tension bolt is disposed at one side of the pressure adjusting spring, and the lower end of the tension bolt extends out of the lower end surface of the lower spring top plate, and the upper end of the tension bolt sequentially passes through the middle valve body and the upper valve body and is connected to the rocker arm in the safety valve body. The gap between the upper spring top plate and the upper valve body and the gap between the lower spring top plate and the valve seat are controlled by pulling the tension bearing bolt through the rocker arm, so that the gap adjustment is realized, and the adjustment is convenient.
In the above-mentioned reset safety valve spring adjusting mechanism, one end of the tensile bolt extending out of the lower spring top plate is screwed with a fastening nut, and one side of the fastening nut facing the lower spring top plate is abutted against the bottom side of the lower spring top plate. Fastening between spring roof and the pressure regulating spring can be realized through adjusting fastening nut to realize compressing tightly of pressure regulating spring bottom.
In the above-mentioned reset safety valve spring adjusting mechanism, the upper end of the tensile bolt passes through the rocker arm and is connected with the rocker arm through an arc-shaped butt joint structure.
In the above-mentioned reset safety valve spring adjusting mechanism, the upper spring top plate and the fixing bolt arranged on the upper valve body are penetrated, and the locking structure comprises a hexagonal locking nut which is arranged above the upper spring top plate and is in threaded connection with the fixing bolt. Can realize compressing tightly between pressure regulating spring top and the last spring roof through rotating hexagon lock nut, adjust convenient and the structure is firm.
In the above-mentioned reset safety valve spring adjusting mechanism, the locking structure further includes a planar thrust roller bearing disposed between the hexagonal locking nut and the upper spring top plate, an upper end surface of the planar thrust roller bearing abuts against a bottom side of the hexagonal locking nut, and a lower end surface of the planar thrust roller bearing abuts against a top side of the upper spring top plate. The planar thrust roller bearing enables the force on the top side of the upper spring top plate to be more uniform and stable when the hexagonal locking nut is screwed.
In foretell relief valve spring guiding mechanism that resets, arc butt joint structure including set up the joint portion that holds the stay bolt tip and be round platform form, the cambered surface of joint portion set up down, just the rocking arm in open the arc wall that has the corresponding setting with joint portion, the cambered surface of joint portion support and lean on in the arc wall. The rocker arm is butted with the tension bolt through the arc-shaped groove and the clamping portion, the connection transition is smooth, and the structure is stable.
In the above-mentioned reset safety valve spring adjusting mechanism, the bottom side of the upper spring top plate and the top side of the lower spring top plate are respectively provided with a positioning boss, and two ends of the pressure regulating spring are respectively sleeved between the positioning bosses on the upper spring top plate and the positioning bosses on the lower spring top plate. The stability of the two ends of the pressure regulating spring in the radial direction of the upper spring top plate and the lower spring top plate can be improved through the positioning bosses, the pressure regulating spring is effectively prevented from inclining, and the guide effect is achieved.
In the reset safety valve spring adjusting mechanism, two pressure adjusting springs are arranged and are respectively arranged on two sides of the tension bearing bolt.
In the reset safety valve spring adjusting mechanism, the gap between the upper spring top plate and the upper valve body is 0.5-1 mm; the clearance between the lower spring top plate and the middle valve body is 0.5-1 mm.
Compared with the prior art, this relief valve spring guiding mechanism that resets's advantage lies in: the upper spring top plate is in clearance fit with the upper valve body, and the lower spring top plate is in clearance fit with the middle valve body, so that the upper spring top plate and the lower spring top plate have a trace amount of movable space relative to the safety valve body, and the pressure regulating spring is prevented from deforming due to side twisting when the lower spring top plate and the upper spring top plate regulate pressure through the locking structure; the gap size of the upper spring top plate and the gap size of the lower spring top plate relative to the safety valve body can be changed through the gap adjusting structure, and the control range is enlarged.
Drawings
FIG. 1 is a schematic structural view provided by the present invention;
fig. 2 is a schematic structural view of another viewing angle provided by the present invention;
in the figure, the safety valve comprises a safety valve body 1, a pressure regulating spring 2, an upper valve body 3, a middle valve body 4, an upper spring top plate 5, a lower spring top plate 6, a locking structure 7, a gap regulating structure 8, a tensile bolt 9, a rocker arm 10, a fastening nut 11, an arc-shaped butt joint structure 12, a fixing bolt 13, a hexagonal locking nut 14, a plane thrust roller bearing 15, a clamping part 16 and an arc-shaped groove 17.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, this relief valve spring guiding mechanism resets, including relief valve body 1, 1 lateral part of relief valve body is equipped with pressure regulating spring 2, relief valve body 1 includes valve body 3, well valve body 4, lower valve body, pressure regulating spring 2's upper end is supported and is leaned on in last spring roof 5, pressure regulating spring 2's lower extreme is supported and is leaned on in lower spring roof 6, go up spring roof 5 and 3 clearance fit of last valve body, be equipped with locking structure 7 between the upper end of going up spring roof 5 and pressure regulating spring 2, lower spring roof 6 and well valve body 4 clearance fit, still be equipped with clearance adjustment structure 8 between lower spring roof 6 and the relief valve body 1.
The upper spring top plate 5 is in clearance fit with the upper valve body 3, and the lower spring top plate 6 is in clearance fit with the middle valve body 4, so that the upper spring top plate 5 and the lower spring top plate 6 have a trace amount of movable space relative to the safety valve body 1, and the pressure regulating spring 2 is prevented from deforming due to side torsion when the lower spring top plate 6 and the upper spring top plate 5 regulate pressure through the locking structure 7; the gap size of the upper spring top plate 5 and the lower spring top plate 6 relative to the safety valve body can be changed through the gap adjusting structure 8, and the control range is enlarged.
The clearance adjusting structure 8 is including setting up the stay bolt 9 of wearing to establish in spring roof 6 down, stay bolt 9 sets up in pressure regulating spring 2 one side and the lower extreme of this stay bolt 9 stretches out in the lower terminal surface of spring roof 6 down, stay bolt 9's upper end is passed well valve body 4 and last valve body 3 in proper order and is linked to each other with rocking arm 10 in the relief valve body 1, stay bolt 9 is held in the pulling through rocking arm 10 tractive and is controlled the relative clearance of going up valve body 3 of spring roof 5 and the clearance of centering valve body 4 mutually of spring roof 6 down, thereby realize clearance adjustment, it is convenient to adjust, and can improve the reliability of leaning on the point and have a wider home range when setting initial pressure.
The end, extending out of the lower spring top plate 6, of the tension bearing bolt 9 is in threaded connection with a fastening nut 11, one side, facing the lower spring top plate 6, of the fastening nut 11 abuts against the bottom side of the lower spring top plate 6, fastening between the lower spring top plate 6 and the pressure regulating spring 2 can be achieved through adjustment of the fastening nut 11, accordingly compression of the bottom end of the pressure regulating spring 2 is achieved, the stress at the position is increased through locking and bearing, and the lower spring top plate 6 cannot be displaced during jump blasting to enable initial force to change.
Preferably, hold the upper end of drawing bolt 9 and pass rocking arm 10 and link to each other with rocking arm 10 through arc butt joint structure 12, go up spring roof 5 and set up fixing bolt 13 on last valve body 3 and wear to establish mutually, locking structure 7 including set up in last spring roof 5 top and with fixing bolt 13 threaded connection's hexagonal lock nut 14, can realize compressing tightly between pressure regulating spring 2 top and the spring roof 5 through rotating hexagonal lock nut 14, adjust convenient and the structure is firm.
Further, locking structure 7 still includes the plane thrust roller bearing 15 that sets up between hexagonal lock nut 14 and last spring roof 5, and the up end of plane thrust roller bearing 15 supports and leans on in hexagonal lock nut 14 bottom side, and the lower terminal surface of plane thrust roller bearing 15 supports and leans on in last spring roof 5 top side, and it is more even steady to the power to last spring roof 5 top side when making hexagonal lock nut 14 screw through plane thrust roller bearing 15. Arc butt-joint structural 12 is including setting up the joint portion 16 that holds the bolt 9 tip and be the round platform form, and the cambered surface of joint portion 16 sets up downwards, and opens in the rocking arm 10 have with the corresponding arc wall 17 that sets up of joint portion 16, and the cambered surface of joint portion 16 supports and leans on in arc wall 17, realizes rocking arm 10 and the butt joint of holding the bolt 9 through arc wall 17 and joint portion 16, connects the transition rounding and smoothing, and the structure is firm, makes each blasting take-off point on a position all the time.
Furthermore, the bottom side of the upper spring top plate 5 and the top side of the lower spring top plate 6 are respectively provided with a positioning boss, the two ends of the pressure regulating spring 2 are respectively sleeved between the positioning bosses on the upper spring top plate 5 and the positioning bosses on the lower spring top plate 6, the stability of the two ends of the pressure regulating spring 2 in the radial direction of the upper spring top plate 5 and the lower spring top plate 6 can be improved through the positioning bosses, the pressure regulating spring 2 is effectively prevented from tilting, and the guide effect is achieved.
In addition, two pressure regulating springs 2 are respectively arranged on two sides of the tensile bolt 9, and the gap between the upper spring top plate 5 and the upper valve body 3 is 0.5-1 mm; the gap between the lower spring top plate 6 and the middle valve body 4 is 0.5-1mm, and the upper spring top plate 5 and the lower spring top plate 6 are laterally twisted in a reasonable range by controlling the gap, so that the lateral twist of the spring is reduced
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms of the safety valve body 1, the pressure regulating spring 2, the upper valve body 3, the middle valve body 4, the upper spring top plate 5, the lower spring top plate 6, the locking structure 7, the gap adjusting structure 8, the tensile bolt 9, the rocker arm 10, the fastening nut 11, the arc-shaped abutting structure 12, the fixing bolt 13, the hexagonal locking nut 14, the flat thrust roller bearing 15, the clamping portion 16, the arc-shaped groove 17, and the like are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (10)
1. The utility model provides a relief valve spring guiding mechanism resets, includes relief valve body (1), relief valve body (1) lateral part be equipped with pressure regulating spring (2), a serial communication port, relief valve body (1) include valve body (3), well valve body (4), lower valve body, the upper end of pressure regulating spring (2) support and lean on in last spring roof (5), the lower extreme of pressure regulating spring (2) support and lean on in spring roof (6) down, last spring roof (5) and last valve body (3) clearance fit, the upper end of going up spring roof (5) and pressure regulating spring (2) between be equipped with locking structure (7), lower spring roof (6) and well valve body (4) clearance fit, lower spring roof (6) and relief valve body (1) between still be equipped with clearance adjustment structure (8).
2. The reset safety valve spring adjusting mechanism according to claim 1, wherein the clearance adjusting structure (8) comprises a tension bolt (9) arranged in the lower spring top plate (6), the tension bolt (9) is arranged at one side of the pressure regulating spring (2) and the lower end of the tension bolt (9) extends out of the lower end surface of the lower spring top plate (6), and the upper end of the tension bolt (9) sequentially passes through the middle valve body (4) and the upper valve body (3) and is connected with a rocker arm (10) in the safety valve body (1).
3. The reset safety valve spring adjusting mechanism according to claim 2, characterized in that one end of the tension bolt (9) extending out of the lower spring top plate (6) is screwed with a fastening nut (11), and one side of the fastening nut (11) facing the lower spring top plate (6) is abutted against the bottom side of the lower spring top plate (6).
4. The reset relief valve spring adjustment mechanism of claim 3 wherein the upper end of the tensile bolt (9) passes through the rocker arm (10) and is connected to the rocker arm (10) by an arcuate abutment (12).
5. The reset safety valve spring adjusting mechanism according to claim 1, wherein the upper spring top plate (5) is penetrated by a fixing bolt (13) arranged on the upper valve body (3), and the locking structure (7) comprises a hexagonal locking nut (14) which is arranged above the upper spring top plate (5) and is in threaded connection with the fixing bolt (13).
6. The reset safety valve spring adjustment mechanism according to claim 5, wherein the locking structure (7) further comprises a flat thrust roller bearing (15) disposed between the hexagonal locking nut (14) and the upper spring top plate (5), an upper end surface of the flat thrust roller bearing (15) abuts against a bottom side of the hexagonal locking nut (14), and a lower end surface of the flat thrust roller bearing (15) abuts against a top side of the upper spring top plate (5).
7. The reset safety valve spring adjusting mechanism according to claim 4, wherein the arc-shaped butt joint structure (12) comprises a circular truncated cone-shaped clamping portion (16) provided with an end portion of the tension bolt (9), an arc surface of the clamping portion (16) is arranged downwards, an arc-shaped groove (17) corresponding to the clamping portion (16) is formed in the rocker arm (10), and the arc surface of the clamping portion (16) abuts against the arc-shaped groove (17).
8. The adjusting mechanism of the reset safety valve spring according to claim 1, characterized in that the bottom side of the upper spring top plate (5) and the top side of the lower spring top plate (6) are respectively provided with a positioning boss, and both ends of the pressure regulating spring (2) are respectively sleeved between the positioning bosses on the upper spring top plate (5) and the positioning bosses on the lower spring top plate (6).
9. The reset safety valve spring adjusting mechanism according to claim 2, wherein the two pressure regulating springs (2) are respectively arranged on two sides of the tension bearing bolt (9).
10. The reset safety valve spring adjustment mechanism according to claim 1, characterized in that the gap between the upper spring top plate (5) and the upper valve body (3) is 0.5-1 mm; the clearance between the lower spring top plate (6) and the middle valve body (4) is 0.5-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920629911.9U CN209839259U (en) | 2019-05-05 | 2019-05-05 | Spring adjusting mechanism of reset safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920629911.9U CN209839259U (en) | 2019-05-05 | 2019-05-05 | Spring adjusting mechanism of reset safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209839259U true CN209839259U (en) | 2019-12-24 |
Family
ID=68915666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920629911.9U Active CN209839259U (en) | 2019-05-05 | 2019-05-05 | Spring adjusting mechanism of reset safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209839259U (en) |
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2019
- 2019-05-05 CN CN201920629911.9U patent/CN209839259U/en active Active
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
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Effective date of registration: 20240304 Address after: 315000 Industrial Zone, Pingtang village, Dongwu Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee after: Ningbo Nengyuan Machinery Co.,Ltd. Country or region after: China Address before: Room 2113, No. 2, Lishi Financial Building, Shounan Street, Yinzhou District, Ningbo City, Zhejiang Province, 315100 Patentee before: Hailiter Petroleum Equipment (Ningbo) Co.,Ltd. Country or region before: China |