CN210240690U - Screw thread pressing mode check valve - Google Patents
Screw thread pressing mode check valve Download PDFInfo
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- CN210240690U CN210240690U CN201920838919.6U CN201920838919U CN210240690U CN 210240690 U CN210240690 U CN 210240690U CN 201920838919 U CN201920838919 U CN 201920838919U CN 210240690 U CN210240690 U CN 210240690U
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- valve body
- spring
- piston rod
- fixedly connected
- way valve
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Abstract
The utility model relates to a screw thread pressing mode check valve, including valve body and clamping ring, install the rectification piece in the valve body, the lateral wall of rectification piece with the inner wall fixed connection of valve body, the bottom surface of rectification piece is equipped with a plurality of diffluence orifices, install piston cylinder, piston rod and spring in the rectification piece, the spring cup joints on the piston rod, the spring with the equal fixed connection of one end of piston rod to the inboard bottom surface of rectification piece, the lateral surface that states the clamping ring with the medial surface threaded connection of valve body, the opening part of the inboard lower extreme of clamping ring is equipped with V type chamfer, V type chamfer with the mount pad blocks and keeps off mutually. A thread compression type one-way valve effectively prevents blowout and poor pump.
Description
Technical Field
The utility model relates to a screw rod drilling tool correlation technique field, concretely relates to screw thread pressing mode check valve.
Background
The screw drilling tool is a positive displacement downhole power drilling tool which takes drilling fluid as power and converts liquid pressure energy into mechanical energy. When slurry pumped by the slurry pump flows through the bypass valve and enters the motor, a certain pressure difference is formed between the inlet and the outlet of the motor, the rotor is pushed to rotate around the axis of the stator, and the rotating speed and the torque are transmitted to the drill bit through the universal shaft and the transmission shaft, so that the drilling operation is realized.
The screw drilling tool is mainly composed of a bypass valve assembly, an anti-drop assembly, a motor assembly, a universal shaft assembly and a transmission shaft assembly, the screw drilling tool is mostly adopted in modern drilling engineering operation, measurement while drilling is needed, in order to improve the safety coefficient of the drilling operation, a blowout prevention safety device is required to be configured during operation, the well logging tool is prevented from being damaged by mud backflow, and blowout and pump bouncing are prevented when the mud pressure is smaller than the bottom hole pressure during the drilling process.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model provides a screw thread pressing mode check valve, the effectual blowout and poor pump that prevent takes place.
In order to achieve the above object, the utility model adopts the following technical scheme: a thread compression type one-way valve comprises a valve body and a pressing ring.
The valve is characterized in that a rectifying block is installed in the valve body, the outer side wall of the rectifying block is fixedly connected with the inner wall of the valve body, a plurality of shunting holes are formed in the bottom surface of the rectifying block, and a piston cylinder, a piston rod and a spring are installed in the rectifying block.
The spring is sleeved on the piston rod, one end of the spring and one end of the piston rod are fixedly connected to the bottom surface of the inner side of the rectifying block, the piston rod is matched with the piston cylinder for use, the other end of the spring is pressed against one end of the piston cylinder, and the other end of the piston cylinder is fixedly connected to the mounting seat.
The mount pad includes conical base and sphere connector, conical base's one end fixed connection to the piston cylinder, conical base's other end fixed connection to the sphere connector, the top surface of sphere connector is the sphere.
The clamping ring is fixedly connected with the inner side face of the valve body, a V-shaped chamfer is arranged at an opening at the lower end of the inner side of the clamping ring, and the V-shaped chamfer is tangent to the spherical surface and is in sealing fit with the spherical surface.
Preferably, the inside wall at valve body top is equipped with the internal thread, the lateral wall of valve body bottom is equipped with the external screw thread, plays the connection effect.
In any of the above aspects, preferably, the valve body top end opening is larger than the valve body bottom end opening.
In any of the above schemes, preferably, the rectification block includes a box body and a mounting sleeve, the bottom surface of the box body is fixedly connected to the mounting sleeve protruding downward, the spring and the piston rod are mounted in the mounting sleeve, one end of the piston rod and one end of the spring are fixedly connected to the bottom surface inside the mounting sleeve, and the other end of the piston rod extends upward to be matched with the piston cylinder for use.
In any of the above solutions, preferably, a gasket is provided at a connection position of the mounting sleeve and the piston cylinder.
In any of the above schemes, preferably, the bottom surface of the rectification block is provided with 8 circumferentially arranged diversion holes.
In any of the above schemes, preferably, the 8 diversion holes are equal in size, the diameters of the diversion holes are all 26mm, the diversion holes are circumferentially arranged at equal angles and equal intervals, the diversion holes are uniformly distributed in the inner holes of the rectifier block, the flow rate of slurry is balanced, and erosion abrasion to the rectifier block is reduced.
In any of the above embodiments, preferably, the pressing ring and the mounting seat are used in cooperation, and both the pressing ring and the mounting seat are made of 2Cr13 martensitic stainless steel.
In any of the above aspects, preferably, an outer side surface of the pressing ring is screwed to an inner side surface of the valve body.
In any of the above aspects, preferably, the bottom surface of the pressing ring is attached to the top surface of the rectification block.
Compared with the prior art, the utility model provides a pair of screw thread pressing mode check valve has following beneficial effect:
1. through cup jointing the spring on adopting the piston thick stick, external force transmits the spring and then produces the displacement through the location piston, and the spring has the pretightning force in the work, improves the life of spring.
2. The mounting seat and the pressing ring are blocked and mutually pressed, the mounting seat with the conical design and the pressing ring with the V-shaped chamfer are matched for use, the mounting seat is pressed when slurry flows downwards, and the stress direction of the mounting seat points to the axis and is uniformly stressed; the mounting seat is jacked when slurry flows upwards, the mounting seat jacks the pressing ring, the conical mounting seat and the V-shaped chamfer angle can be automatically adjusted, sealing between the pressing ring and the mounting seat is guaranteed, and meanwhile the sealing effect is better along with the enhancement of the stress of the mounting seat.
3. The piston is matched with the rectifying block, so that the piston can move coaxially up and down without circumferential swing, the abrasion can be reduced, and the service life is prolonged.
4. The inner holes of the rectifier blocks are uniformly provided with the shunting holes, so that the flow rate of slurry is balanced, and the erosion and abrasion of the rectifier blocks are reduced.
Drawings
Fig. 1 is a schematic view of an overall structure of a preferred embodiment of a screw-thread compression check valve provided by the present invention;
the figures are labeled as follows: 1. a valve body; 2. pressing a ring; 3. a mounting seat; 4. rectifying blocks; 5. a spring; 6. a piston cylinder; 7. a piston rod; 8. and a shunt hole.
Detailed Description
In order to further understand the inventive content of the present invention, the present invention will be explained in detail with reference to the specific embodiments.
As shown in fig. 1, an embodiment of a screw-thread pressing check valve according to the present invention includes a valve body 1 and a pressing ring 2;
the opening on the top end of the valve body 1 is larger than the opening on the bottom end of the valve body 1, the inner side wall on the top end of the valve body 1 is provided with internal threads, and the outer side wall on the bottom end of the valve body 1 is provided with external threads to play a role in connection.
In this embodiment, the arrangement of the internal thread and the external thread is not limited to the above-mentioned manner, and may be other threads capable of achieving technical effects.
The top end and the bottom end of the valve body 1 are not limited to the threaded manner, and may be formed by other manners, such as welding.
Install rectification block 4 in the valve body 1, the lateral wall of rectification block 4 and the inner wall fixed connection of valve body 1, the bottom surface of rectification block 4 is equipped with a plurality of diffluence holes 8, and the bottom surface of rectification block 4 is equipped with the downward outstanding installation cover, installs spring 5 and piston rod 7 in the installation cover.
It should be noted that a gasket is arranged at the joint of the mounting sleeve and the piston cylinder 6.
In this embodiment, the bottom surface of fairing block 4 is equipped with 8 reposition of redundant personnel holes 8 of circumferential arrangement, and 8 reposition of redundant personnel holes 8's size is equal, and the diameter of reposition of redundant personnel hole 8 is 26mm, and equidistant circumferential arrangement of equal angle, and fairing block 4 hole equipartition reposition of redundant personnel hole 8 balances the mud velocity of flow, reduces the erosion and wear to fairing block 4.
The pressing ring 2 and the mounting seat 3 are used in combination, and the material of the pressing ring 2 and the material of the mounting seat 3 are both 2Cr13 martensitic stainless steel.
The working principle and method of the embodiment are as follows:
during normal work, slurry flows into the inner thread end from the top end of the valve body 1 and enters the valve body 1, when the pressure of the slurry is continuously increased, the pressure of the slurry is greater than the pre-tightening force of the spring 5, the slurry pushes the mounting seat 3, the mounting seat 3 forces the piston cylinder 6 to move downwards along the piston rod 7, and the slurry enters the drilling tool through the flow dividing holes 8 of the flow rectifying blocks 4, so that operation is realized.
When the mud pressure is lower than the bottom hole pressure, the mud flows in from the external thread end at the bottom end of the valve body 1 and enters the valve body 1, flows into the rectifying block 4 through the shunt hole 8 of the rectifying block 4, and moves upwards to jack the mounting base 3, and the conical surface of the mounting base 3 is in contact with the pressing ring 2 to jack, so that the sealing effect is achieved, the sealing effect is good when the bottom hole pressure is high, the mounting base 3 and the pressing ring 2 jack, the mud is effectively prevented from damaging a well logging tool due to the backflow, and blowout and poor pumping are avoided.
Compared with the prior art, the embodiment has the following beneficial effects:
1. through cup jointing the spring on adopting the piston thick stick, external force transmits the spring and then produces the displacement through the location piston, and the spring has the pretightning force in the work, improves the life of spring.
2. The mounting seat and the pressing ring are blocked and mutually pressed, the mounting seat with the conical design and the pressing ring with the V-shaped chamfer are matched for use, the mounting seat is pressed when slurry flows downwards, and the stress direction of the mounting seat points to the axis and is uniformly stressed; when slurry flows upwards, the mounting seat is jacked, the mounting seat jacks the pressing ring, the conical mounting seat and the V-shaped chamfer angle can be automatically adjusted, sealing between the pressing ring and the mounting seat is guaranteed, and meanwhile, the sealing effect is better along with the enhancement of the stress of the mounting seat.
3. The piston is matched with the rectifying block, so that the piston can move coaxially up and down without circumferential swing, the abrasion can be reduced, and the service life is prolonged.
4. The inner holes of the rectifier blocks are uniformly provided with the shunting holes, so that the flow rate of slurry is balanced, and the erosion and abrasion of the rectifier blocks are reduced.
It will be understood by those skilled in the art that any combination of the elements of the present invention, including the summary and detailed description of the invention provided in the foregoing description and illustrated in the accompanying drawings, is not to be considered limiting in scope and in order to make the description more concise, and not to describe every element of the combination. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a screw thread pressing mode check valve which characterized in that: comprises a valve body and a pressing ring;
a rectifying block is arranged in the valve body, the outer side wall of the rectifying block is fixedly connected with the inner wall of the valve body, a plurality of shunting holes are formed in the bottom surface of the rectifying block, and a piston cylinder, a piston rod and a spring are arranged in the rectifying block;
the spring is sleeved on the piston rod, one end of the spring and one end of the piston rod are both fixedly connected to the bottom surface of the inner side of the rectifying block, the piston rod is matched with the piston cylinder for use, the other end of the spring is pressed against one end of the piston cylinder, and the other end of the piston cylinder is fixedly connected to the mounting seat;
the mounting seat comprises a conical base and a spherical connector, one end of the conical base is fixedly connected to the piston cylinder, the other end of the conical base is fixedly connected to the spherical connector, and the top surface of the spherical connector is spherical;
the clamping ring is fixedly connected with the inner side face of the valve body, a V-shaped chamfer is arranged at an opening at the lower end of the inner side of the clamping ring, and the V-shaped chamfer is tangent to the spherical surface and is in sealing fit with the spherical surface.
2. A threaded compression one-way valve as claimed in claim 1 wherein: the inside wall on valve body top is equipped with the internal thread, the lateral wall of valve body bottom is equipped with the external screw thread.
3. A threaded compression one-way valve as claimed in claim 1 wherein: the top opening of the valve body is larger than the bottom opening of the valve body.
4. A threaded compression one-way valve as claimed in claim 1 wherein: the rectifying block comprises a box body and an installation sleeve, the bottom surface of the box body is fixedly connected with the installation sleeve protruding downwards, the spring and the piston rod are installed in the installation sleeve, one ends of the piston rod and the spring are fixedly connected with the bottom surface inside the installation sleeve, and the other end of the piston rod extends upwards to be matched with the piston cylinder for use.
5. A threaded compression one-way valve as claimed in claim 4 wherein: and a gasket is arranged at the joint of the mounting sleeve and the piston cylinder.
6. A threaded compression one-way valve as claimed in claim 4 wherein: the bottom surface of the box body is provided with 8 shunt holes which are circumferentially arranged.
7. A threaded compression one-way valve as claimed in claim 6 wherein: the 8 flow distribution holes are equal in size, the diameters of the flow distribution holes are all 26mm, and the flow distribution holes are arranged in a circle at equal angles and equal intervals.
8. A threaded compression one-way valve as claimed in claim 1 wherein: the pressing ring and the mounting seat are matched for use, and both the pressing ring and the mounting seat are made of 2Cr13 martensitic stainless steel.
9. A threaded compression one-way valve as claimed in claim 1 wherein: and the outer side surface of the pressing ring is in threaded connection with the inner side surface of the valve body.
10. A threaded compression one-way valve as claimed in claim 1 wherein: the bottom surface of the pressing ring is attached to the top surface of the rectifying block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920838919.6U CN210240690U (en) | 2019-06-05 | 2019-06-05 | Screw thread pressing mode check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920838919.6U CN210240690U (en) | 2019-06-05 | 2019-06-05 | Screw thread pressing mode check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210240690U true CN210240690U (en) | 2020-04-03 |
Family
ID=69973387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920838919.6U Active CN210240690U (en) | 2019-06-05 | 2019-06-05 | Screw thread pressing mode check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210240690U (en) |
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2019
- 2019-06-05 CN CN201920838919.6U patent/CN210240690U/en active Active
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