CN219605692U - Novel back pressure valve for tunnel drilling machine - Google Patents
Novel back pressure valve for tunnel drilling machine Download PDFInfo
- Publication number
- CN219605692U CN219605692U CN202320530661.XU CN202320530661U CN219605692U CN 219605692 U CN219605692 U CN 219605692U CN 202320530661 U CN202320530661 U CN 202320530661U CN 219605692 U CN219605692 U CN 219605692U
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- Prior art keywords
- valve
- pressure regulating
- pressure
- seat
- steel ball
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- 238000005553 drilling Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 90
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 239000003921 oil Substances 0.000 description 55
- 238000000034 method Methods 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Check Valves (AREA)
Abstract
The novel back pressure valve for the tunnel drilling machine comprises a valve body, wherein two oil inlets C1 and C2 are formed in the valve body, a push rod, a reset spring seat, a reset spring and a one-way valve are sequentially arranged in a mounting hole of the valve body, the one-way valve comprises a valve sleeve, a steel ball, a pressure regulating spring seat and a pressure regulating jackscrew, the valve sleeve is arranged in the mounting hole in a sealing sliding manner, the steel ball, the pressure regulating spring and the pressure regulating spring seat are arranged in the pressure regulating valve seat, the steel ball seals the valve sleeve under the action of the pressure regulating spring, the two oil inlets C1 and C2 are respectively positioned at two sides of the valve sleeve and are isolated through the one-way valve, and after the valve sleeve is compressed and moved left under the action of oil pressure entering the oil inlet C1, the steel ball can be separated from the valve sleeve under the action of the push rod, so that the one-way valve is opened to communicate the two oil inlets C1 and C2; the pressure regulating jackscrew is propped against one end of the pressure regulating spring seat and used for regulating the initial pressure of the pressure regulating spring to the steel ball. The back pressure valve has the advantages of simple and compact structure, small volume, low cost and wide application.
Description
Technical Field
The utility model relates to the field of hydraulic valves, in particular to a novel back pressure valve for an underground drill rig.
Background
At present, a feeding oil cylinder of the tunnel drilling machine for feeding drill is controlled by a three-position six-way reversing valve plate with a Y-shaped function at the neutral position in a multi-way reversing valve. The three-position six-way valve with Y-shaped function is mainly used for realizing floating of a piston rod of a feed cylinder when a drill rod is screwed in and screwed out during screwing-out. However, when a hole forming a certain angle with the horizontal plane is drilled, the piston rod of the feed cylinder is connected with the gyrator and the slide plate, and oil is introduced into the opening of the reversing valve plate A, B at the neutral position, so that the gyrator and the slide plate slide downwards under the action of the dead weight of the gyrator and the slide plate, and the drill rod cannot be replaced. Thus, a back pressure valve for preventing the hydraulic oil from flowing back to the oil tank to build back pressure is additionally arranged between the reversing valve plate and the feeding oil cylinder, so that the weight of the gyrator and the sliding plate is balanced.
The existing backpressure valve used in the market is generally arranged on an oil return path, hydraulic oil at an outlet of the backpressure valve is directly returned to an oil tank, and the backpressure valve is not suitable for being arranged on a tunnel drilling machine; and the existing back pressure valve pressure regulating main hole and the check valve mounting hole are separately arranged, so that the size is large, and the device cannot adapt to a narrow mounting space of a tunnel drilling machine.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the novel back pressure valve for the tunnel drilling machine, which has the advantages of simple and compact structure, small volume, low cost and wide application.
The technical scheme of the utility model is as follows:
the novel back pressure valve for the tunnel drilling machine comprises a valve body, wherein two oil inlets C1 and C2 are formed in the valve body, and the back pressure valve is characterized in that: the valve body is internally provided with a push rod, a reset spring seat, a reset spring and a one-way valve in sequence, the one-way valve comprises a valve sleeve, a steel ball, a pressure regulating spring seat, a pressure regulating valve seat and a pressure regulating jackscrew, wherein the valve sleeve is hermetically and slidably arranged in the mounting hole, the steel ball, the pressure regulating spring and the pressure regulating spring seat are arranged in the pressure regulating valve seat, the steel ball seals the valve sleeve under the action of the pressure regulating spring, the two oil inlets C1 and C2 are respectively positioned at two sides of the valve sleeve and are isolated by the one-way valve, and after the valve sleeve compresses the reset spring to move left under the action of oil pressure entering through the oil inlet C1, the steel ball can be separated from the valve sleeve under the action of the push rod, so that the one-way valve is opened to be communicated with the two oil inlets C1 and C2; the pressure regulating jackscrew is propped against one end of the pressure regulating spring seat and used for regulating the initial pressure of the pressure regulating spring to the steel ball.
As a further preferable mode, the mounting hole is a stepped hole, the ejector rod is T-shaped, the big end of the ejector rod abuts against the inner end of the mounting hole, and the reset spring seat is clamped at the stepped part of the mounting hole.
As a further preferable mode, the reset spring seat and the reset spring are sleeved at the small end of the ejector rod, and one end of the reset spring is inserted into the valve sleeve.
Preferably, the valve sleeve is sleeved with an O-shaped sealing ring for realizing sliding sealing of the valve sleeve and the valve body.
As further preferable, U-shaped openings are uniformly distributed at the inner end of the pressure regulating valve seat along the circumferential direction and are used for guiding the pressure oil entering from the oil inlet C1 into the one-way valve to push the valve sleeve to move.
Preferably, the pressure regulating valve seat is connected in the mounting hole through threads, and an O-shaped sealing ring is sleeved on the pressure regulating spring seat and used for realizing sliding sealing between the pressure regulating spring seat and the pressure regulating valve seat.
As a further preferable mode, the pressure regulating top wire is connected in a central hole of the pressure regulating valve seat through threads, and a locking nut is arranged on the pressure regulating top wire so as to lock the initial pressure of the pressure regulating spring to the steel ball.
The beneficial effects of the utility model are as follows:
1. the back pressure valve pushes the valve sleeve to compress the return spring to move backwards through the oil pressure entering through the oil inlet C1 until the steel ball is separated from the valve sleeve under the action of the ejector rod, so that the check valve is opened to be communicated with the two oil inlets C1 and C2, the structure that the pressure regulating valve structure and the check valve structure are arranged in the same mounting hole is realized, and compared with the traditional back pressure valve, the back pressure valve is simple in structure, easy to process, small in size and low in manufacturing cost.
2. Because the pressure regulating jackscrew is propped against one end of the pressure regulating spring seat and is used for regulating the pressure regulating spring, the compression amount and the initial pressure of the pressure regulating spring to the steel ball, the back pressure valve is widely applied, and can be applied to not only controlling a feeding oil cylinder of a tunnel drilling machine responsible for drilling, but also being applied to hydraulic systems of other mechanical equipment under similar working conditions.
3. The valve sleeve is closed under the action of the pressure regulating spring through the steel ball, the back pressure generated by the pressure regulating spring can prevent the rotator and the sliding plate from sliding downwards, so that the drill rod is kept in place, and the purposes that the piston rod of the feed oil cylinder follows up and the drill rod does not slide downwards in the process of replacing the drill rod are realized.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a hydraulic schematic of the present utility model.
Fig. 3 is a schematic view of the use state of the present utility model.
In the figure: 1. the valve comprises a valve body, a 2, a push rod, a 3, a reset spring seat, a 4, a reset spring, a 5, a valve sleeve, a 6, a steel ball, a 7, a pressure regulating spring, a 8, a pressure regulating valve seat, a 9, a pressure regulating spring seat, a 10, a lock nut, a 11, a pressure regulating top wire, a 12, an O-shaped sealing ring, a 13, a sealing gasket, a 14, a feed cylinder, a 15 and a reversing valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.
As shown in fig. 1-2, the novel back pressure valve for the tunnel drilling machine comprises a valve body 1, wherein two oil inlets C1 and C2 are arranged on the valve body 1, the two oil inlets C1 and C2 are respectively positioned on the top surface and the bottom surface of the valve body 1, a mounting hole 101 for communicating the two oil inlets C1 and C2 is arranged in the middle of the valve body 1 along the horizontal direction, the mounting hole 101 is a stepped blind hole, and a push rod 2, a reset spring seat 3, a reset spring 4 and a one-way valve are sequentially arranged in the mounting hole 101 from inside to outside. The ejector rod 2 is T-shaped, the big end of the ejector rod is propped against the inner end of the mounting hole 101, the reset spring seat 3 is clamped at the step part in the mounting hole 101, the reset spring seat 3 and the reset spring 4 are sleeved on the small end of the ejector rod 2, one end of the reset spring 4 is sleeved on the reset spring seat 3, and the other end of the reset spring is inserted into the valve sleeve 5 of the one-way valve.
The one-way valve comprises a valve sleeve 5, a steel ball 6, a pressure regulating spring 7, a pressure regulating spring seat 9, a pressure regulating valve seat 8 and a pressure regulating top wire 11 which are sequentially arranged, wherein the valve sleeve 5 is installed in the installation hole 101 in a sealing and sliding manner, and an O-shaped sealing ring 12 is sleeved on the valve sleeve 5 and is used for realizing sliding sealing between the valve sleeve 5 and the valve body 1; the pressure regulating valve seat 8 is fixedly connected in the mounting hole 101 through threads, and a sealing gasket 13 is sleeved between the pressure regulating valve seat 8 and the valve body 1, and the sealing gasket 13 is a combined sealing gasket. The steel ball 6, the pressure regulating spring 7 and the pressure regulating spring seat 9 are arranged in a stepped central hole of the pressure regulating valve seat 8 in a sliding clearance fit manner, and the steel ball 6 seals the valve sleeve 5 under the action of the pressure regulating spring 7; the two oil inlets C1 and C2 are respectively positioned at two sides of the valve sleeve 5 and are isolated by a one-way valve, after the valve sleeve 5 compresses the return spring 4 to move left under the action of oil pressure entering from the oil inlet C1, the steel ball 6 can be separated from the valve sleeve 5 under the action of the ejector rod 2, so that the one-way valve is opened to communicate the two oil inlets C1 and C2; the pressure regulating jackscrew 11 is connected in the outer port of the central hole of the pressure regulating valve seat 8 through threads, and the inner end of the pressure regulating jackscrew 11 is propped against one end of the pressure regulating spring seat 9 and used for regulating the initial pressure of the pressure regulating spring 7 to the steel ball 6.
U-shaped openings 801 are uniformly distributed at the inner end of the pressure regulating valve seat 8 along the circumferential direction and are used for guiding the pressure oil entering from the oil inlet C1 into the one-way valve to push the valve sleeve 5 to move. An O-shaped sealing ring 12 is sleeved on the pressure regulating spring seat 9 and is used for realizing sliding sealing between the pressure regulating spring seat 9 and the pressure regulating valve seat 8.
A locking nut 10 is connected to the pressure regulating jackscrew 11 through threads so as to lock the initial pressure of the pressure regulating spring 7 to the steel ball 6.
When in use, as shown in fig. 3, the oil inlets C1 of the two back pressure valves are respectively communicated with the A, B port of the three-position six-way reversing valve 15 through pipelines, and the oil inlets C2 of the two back pressure valves are respectively communicated with the rodless cavity and the rod-containing cavity of the feed cylinder 14 through pipelines. The operation is as follows:
1. the reversing valve 15 is manually switched to the left position, pressure oil output by an oil pump passes through an opening A of the reversing valve 15 to an oil inlet C1 of the backpressure valve, the valve sleeve 5 is pushed to move left, meanwhile, the steel ball 6 also moves left to the ejector rod 2 under the action of the pressure regulating spring 7, the steel ball 6 is ejected by the ejector rod 2 to be separated from the valve sleeve 5, the one-way valve is opened, the pressure oil passes through a gap between the steel ball 6 and the valve sleeve 5 to an oil inlet C2 and passes through a pipeline to a rodless cavity of the feeding oil cylinder, and the feeding oil cylinder piston is pushed to move right, so that the drilling machine drills. Meanwhile, the oil in the rod cavity of the feeding oil cylinder passes through a pipeline to an oil inlet C2 of another back pressure valve, the steel ball 6 is pushed to move right, and the oil return passes through a gap between the steel ball 6 and the valve sleeve 5 and a U-shaped opening 801 at the inner end of the pressure regulating valve seat 8 to an oil inlet C1, and passes through the pipeline to an oil return tank at the port B of the reversing valve 15.
2. When the feeding oil cylinder reaches the maximum stroke, the reversing valve 15 is manually switched to the right position, the pressure oil output by the oil pump passes through the port B of the reversing valve and the pipeline to the oil inlet C1 of the corresponding back pressure valve, and the working process is as described above. And when the feeding oil cylinder is in idle return stroke to the maximum stroke, the reversing valve is manually switched to the left position, so that the drilling machine performs the next drilling process.
The above steps 1 and 2 are repeated until the drill rod is fully drilled.
3. After the drill rod is completely drilled, the drill rod is needed to be connected, the reversing valve is manually switched to the middle position, and the reversing valve is enabled to be Y-shaped, oil is fed to the opening A, B at the moment, a drilling machine rotator and a sliding plate are connected with a piston rod of a feeding oil cylinder, when a hole forming a certain included angle with a horizontal plane is drilled, the rotator and the sliding plate slide easily due to weight, a steel ball 6 of the back pressure valve abuts against a valve sleeve 5 under the action of a pressure regulating spring 7, and the back pressure generated by the pressure regulating spring force prevents the rotator and the sliding plate from sliding downwards, so that the drill rod is kept in place; the rotator rotates reversely or positively to drive the connecting screw of the drill rod to unscrew or screw in, so as to drive the feeding oil cylinder to retreat or advance; the oil return of the rodless cavity and the rod cavity of the feed oil cylinder generates certain pressure to overcome the pressure regulating spring force, and the steel ball 6 is opened to return the oil tank through the oil inlet C1, the pipeline and the port A or the port B of the reversing valve, so that the purposes that the piston rod of the feed oil cylinder follows and the drill rod does not slide down in the process of replacing the drill rod are realized.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. The utility model provides a novel backpressure valve for tunnel drilling machine, includes the valve body, is equipped with two oil inlets C1, C2, characterized by on the valve body: the valve body is internally provided with a push rod, a reset spring seat, a reset spring and a one-way valve in sequence, the one-way valve comprises a valve sleeve, a steel ball, a pressure regulating spring seat, a pressure regulating valve seat and a pressure regulating jackscrew, wherein the valve sleeve is hermetically and slidably arranged in the mounting hole, the steel ball, the pressure regulating spring and the pressure regulating spring seat are arranged in the pressure regulating valve seat, the steel ball seals the valve sleeve under the action of the pressure regulating spring, the two oil inlets C1 and C2 are respectively positioned at two sides of the valve sleeve and are isolated by the one-way valve, and after the valve sleeve compresses the reset spring to move left under the action of oil pressure entering through the oil inlet C1, the steel ball can be separated from the valve sleeve under the action of the push rod, so that the one-way valve is opened to be communicated with the two oil inlets C1 and C2; the pressure regulating jackscrew is propped against one end of the pressure regulating spring seat and used for regulating the initial pressure of the pressure regulating spring to the steel ball.
2. The novel back pressure valve for the tunnel drilling machine according to claim 1, wherein the back pressure valve is characterized in that: the mounting hole is a stepped hole, the ejector rod is T-shaped, the big end of the ejector rod props against the inner end of the mounting hole, and the reset spring seat is clamped at the stepped part of the mounting hole.
3. The novel back pressure valve for the tunnel drilling machine according to claim 2, wherein the back pressure valve is characterized in that: the reset spring seat and the reset spring are sleeved at the small end of the ejector rod, and one end of the reset spring is inserted into the valve sleeve.
4. A novel back pressure valve for an underground drill rig according to claim 1 or 3, characterized in that: an O-shaped sealing ring is sleeved on the valve sleeve and used for realizing sliding sealing of the valve sleeve and the valve body.
5. The novel back pressure valve for the tunnel drilling machine according to claim 1, wherein the back pressure valve is characterized in that: u-shaped openings are uniformly distributed at the inner end of the pressure regulating valve seat along the circumferential direction and are used for guiding pressure oil entering from the oil inlet C1 into the one-way valve to push the valve sleeve to move.
6. The novel back pressure valve for the tunnel drilling machine according to claim 1 or 5, wherein the back pressure valve is characterized in that: the pressure regulating valve seat is connected in the mounting hole through threads, and an O-shaped sealing ring is sleeved on the pressure regulating spring seat and used for realizing sliding sealing between the pressure regulating spring seat and the pressure regulating valve seat.
7. The novel back pressure valve for the tunnel drilling machine according to claim 1, wherein the back pressure valve is characterized in that: the pressure regulating top wire is connected in the central hole of the pressure regulating valve seat through threads, and a locking nut is arranged on the pressure regulating top wire so as to lock the initial pressure of the pressure regulating spring to the steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320530661.XU CN219605692U (en) | 2023-03-18 | 2023-03-18 | Novel back pressure valve for tunnel drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320530661.XU CN219605692U (en) | 2023-03-18 | 2023-03-18 | Novel back pressure valve for tunnel drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219605692U true CN219605692U (en) | 2023-08-29 |
Family
ID=87744719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320530661.XU Active CN219605692U (en) | 2023-03-18 | 2023-03-18 | Novel back pressure valve for tunnel drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219605692U (en) |
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2023
- 2023-03-18 CN CN202320530661.XU patent/CN219605692U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240802 Address after: Wen Di Lou Xiang Wen Di Lou Cun, Linghai City, Jinzhou City, Liaoning Province 121000 Patentee after: Liaoning Bohai Petroleum Machinery Manufacturing Co.,Ltd. Country or region after: China Address before: Wen Dilou Xiang Wen Dilou Cun, Linghai City, Jinzhou, Liaoning Province 121200 Patentee before: Jinzhou Bohai Hydraulic Technology Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |