CN209444647U - A kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders - Google Patents
A kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders Download PDFInfo
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- CN209444647U CN209444647U CN201920127731.0U CN201920127731U CN209444647U CN 209444647 U CN209444647 U CN 209444647U CN 201920127731 U CN201920127731 U CN 201920127731U CN 209444647 U CN209444647 U CN 209444647U
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- valve
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- oil return
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Abstract
The utility model belongs to water conservancy and hydropower steel-slag sand field of hydraulic control, more particularly to a kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders, including at least two inverting modules and a cut-off module, each inverting module is parallel with one another, the upstream of each inverting module and hydraulic series connection of pumps, the downstream of the downstream of each inverting module and the cut-off block coupled in series, the cut-off module is connected at least two hydraulic cylinders；The inverting module and cutoff modes are packaged with being an integral structure.The hydraulic station of the utility model takes total oil way valve block thinking, namely distributed into and out of oil circuit by valve block, each control valve group all uses panel connection type to connect with total oil path block with pressure regulation valve group, each valve block passes through mill processing and guarantees plane finish, oil leakage phenomenon can occur in this way to avoid connector, the maintenance workload of maintenance unit is significantly reduced, integral arrangement is simpler, more compact.
Description
Technical field
The utility model belongs to water conservancy and hydropower steel-slag sand field of hydraulic control, and in particular to one kind is used for a hydraulic station control
The oil way valve block device of multiple hydraulic cylinders processed.
Background technique
General porous station hydraulic station, every gate hole valve group is all made of rigid line with total inlet and outlet of fuel channel and connect, and pipeline
Joint area be particularly easy to occur welding stress, piping precision be not high or operational process in pressure fluctuation lead to joint looseness and
There is phenomena such as pipeline oil leak.
Utility model content
The purpose of the utility model is to provide the use that one kind can effectively improve steel-slag sand hydraulic control circuit assembling quality
The oil way valve block device of Yu Yitai hydraulic station control multiple hydraulic cylinders.
To achieve the above object, the utility model provides following technical scheme: one kind is more for a hydraulic station control
The oil way valve block device of a hydraulic cylinder, including at least two inverting modules and a cut-off module, each inverting module is parallel with one another,
The upstream of each inverting module and hydraulic series connection of pumps, the downstream of each inverting module and the cut-off block coupled in series, the cut-off module
Downstream be connected at least two hydraulic cylinders；The inverting module and cutoff modes are packaged with being an integral structure.
The inverting module includes the first inverting module and the second inverting module, and first inverting module and second are commutated
Valve module is three position four-way directional control valve, and the cut-off module is two six logical shut-off valves, the first inverting module and the second commutation
Work oil inlet A1, A2 of module is connected to the main oil inlet P 3 of cut-off module, the first inverting module and the second inverting module
Work oil return opening B1, B2 respectively with cut-off module two main oil return inlet Ts 3, T4 be connected to, end module work oil inlet A3 and
The rodless cavity of hydraulic cylinder is connected to, and two work oil return openings for ending module are connected to the rod chamber of hydraulic cylinder；First inverting module
It is connected to the main oil inlet P 1 of the second inverting module, P2 with hydraulic pump；The main oil return of first inverting module and the second inverting module
Mouth T1, T2 are connected to oil-recovery tank.
Voltage regulating module is in series between the inverting module and hydraulic pump, the voltage regulating module and inverting module assembly are one
Body formula structure.
Be parallel with overflow module on pipeline between the inverting module and hydraulic pump, the oil return opening of the overflow module with
Oil-recovery tank connection.
The inverting module includes the first spool and the first valve pocket, and first spool is slidably arranged in the in the axial direction
In the first valve opening opened up on one valve pocket, the first annular groove, the second annular groove, third are successively arranged on first spool from left to right
Annular groove and the 4th annular groove, first annular groove, the second annular groove, third annular groove and the 4th annular groove are enclosed with the first valve opening inner wall respectively
At the first valve chamber, the second valve chamber, third valve chamber and the 4th valve chamber, is offered in the first sleeve side wall and be connected to the of the first valve opening
One main oil inlet runner, the first main oil return runner, the first work oil inlet runner and the first work oil return runner, in first valve pocket
Portion offers the first branch flow passage and the second branch flow passage, and the both ends of the first branch flow passage and the second branch flow passage are with first
The connection of valve opening inner cavity；First spool is fitted to be: when the first spool is located at left position, the first main oil inlet runner passes through the 4th
Valve chamber is connected to the first work oil inlet runner, and the first main oil return runner is connected to by the second valve chamber with the first work oil return runner；
When the first spool is located at middle position, the first main oil inlet runner and the first work oil inlet runner are disconnected, the first main oil return runner and the
One work oil return runner disconnects, and the first main oil inlet runner passes sequentially through third valve chamber, the first branch flow passage, the first valve chamber and the
One main oil return runner connection；When the first spool is located at right position, the first main oil inlet runner is worked back by the second valve chamber and first
The connection of oil stream road, the first main oil return runner pass sequentially through the 4th valve chamber, second the first valve chamber of branch flow passage and the first work oil inlet
Runner connection.
The inverting module includes the second spool and the second valve pocket, and second spool is slidably arranged in the in the axial direction
In the second valve opening opened up on two valve pockets, the 5th annular groove, the 6th annular groove and are successively arranged on second spool from left to right
Seven annular grooves, the 5th annular groove, the 6th annular groove and the 7th annular groove enclose the 5th valve chamber, the 6th with the inner wall of the second valve opening respectively
Valve chamber and the 7th valve chamber；The the second main oil inlet runner for being connected to the second valve opening, the second main oil return are offered on second valve pocket
The main oil return runner of runner, third, the second work oil inlet runner, the second work oil return runner and third work oil return runner；It is described
Third branch flow passage is equipped with inside second valve pocket, the both ends and middle part of the third branch flow passage connect with the inner cavity of the second valve opening
It is logical；Second spool is fitted to be: when the second spool is located at left position, the second main oil inlet runner passes through the 6th valve chamber, third
Branch flow passage and the 5th valve chamber and the 7th valve chamber are connected to the second main oil return runner and the main oil return runner of third；When the second spool
When positioned at right position, the second main oil inlet runner, the second main oil return runner and the main oil return runner of third pass through the 6th valve chamber, the 5th respectively
Valve chamber and the 7th valve chamber are connected to the second work oil inlet runner, the second work oil return runner and third work oil return runner.
Each inverting module is affixed by the first transfer block and cut-off module, and first is equipped in first transfer block simultaneously
Join oil circuit, first oil circuit in parallel is in parallel by the work oil inlet runner of each inverting module and connects with the main oil inlet runner of cut-off module
It is logical.
Each inverting module is affixed by the second transfer block and a voltage regulating module, and second is equipped in second transfer block
Oil circuit in parallel, the described second oil circuit in parallel is in parallel by the main oil inlet runner of each inverting module and connects with the oil outlet of voltage regulating module
It is logical；The overflow module is also mounted in the second transfer block.
Between the inverting module, the first transfer block, the second transfer block, cut-off module, voltage regulating module and overflow module
It is bolted and is integrated.
Between the inverting module, the first transfer block, the second transfer block, cut-off module, voltage regulating module and overflow module
Runner interface be equipped with end face seal.
The technical effect that the utility model obtains are as follows: the hydraulic station of the utility model takes total oil way valve block thinking,
It is exactly distributed into and out of oil circuit by valve block, each control valve group and pressure regulation valve group all use panel connection type and total oil circuit
Block connection, each valve block pass through mill processing and guarantee plane finish, can occur oil leakage phenomenon to avoid connector in this way, mitigate significantly
The maintenance workload of maintenance unit, integral arrangement is simpler, more compact.
Detailed description of the invention
Fig. 1 is the perspective view at the wherein visual angle of valve block device provided by the embodiments of the present invention；
Fig. 2 is the perspective view at another visual angle of valve block device provided by the embodiments of the present invention；
Fig. 3 is the schematic diagram of valve block device provided by the embodiments of the present invention；
Fig. 4 is the explosive view of valve block device provided by the embodiments of the present invention；
Fig. 5 is the perspective view of inverting module provided by the embodiments of the present invention；
Fig. 6 is the side view of inverting module provided by the embodiments of the present invention；
Fig. 7 is the A-A cross-sectional view of Fig. 6；
Fig. 8 is the B-B cross-sectional view of Fig. 6；
Fig. 9 is the perspective view of cut-off module provided by the embodiments of the present invention；
Figure 10 is the side view of cut-off module provided by the embodiments of the present invention；
Figure 11 is the C-C cross-sectional view of Figure 10；
Figure 12 is the D-D cross-sectional view of Figure 10.
Specific embodiment
In order to which the purpose of this utility model and advantage is more clearly understood, with reference to embodiments to the utility model into
Row is specific bright.It should be appreciated that following text is only used to one or more of specific embodiments of description the utility model, and
Considered critical is not carried out to the protection scope that the utility model is specifically requested.It should be strongly noted that the table of the utility model
In stating, the statement with orientation finitude such as " left position ", " middle position ", " right position " be based on for Fig. 7,8,11,12,
Purpose is for the ease of statement, is not the restriction to technical solutions of the utility model itself.
As shown in Fig. 1,2,4, a kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders, including at least
Two inverting modules 10 and a cut-off module 20, each inverting module 10 is parallel with one another, the upstream of each inverting module 10 with it is hydraulic
Series connection of pumps, the downstream of each inverting module 10 are connected with the cut-off module 20, the downstream and at least two of the cut-off module 20
Hydraulic cylinder 30 is connected；The inverting module 10 is an integral structure with the cut-off assembly of module 20.The inverting module 10 with it is hydraulic
Voltage regulating module 40 is in series between pump, the voltage regulating module 40 is an integral structure with the assembly of inverting module 10.Inverting module 10
Overflow module 50 is parallel on pipeline between hydraulic pump, the oil return opening of the overflow module 50 is connected to oil-recovery tank.It is described
Each inverting module 10 is affixed by the first transfer block 60 and cut-off module 20, is equipped with the first parallel oil in first transfer block 60
Road 61, first oil circuit 61 in parallel is by the work oil inlet runner of each inverting module 10 is in parallel and main oil inlet stream with cut-off module 20
Road connection.Each inverting module 10 is affixed by the second transfer block 70 and a voltage regulating module 40, in second transfer block 70
Equipped with the second oil circuit 71 in parallel, the described second oil circuit 71 in parallel by the main oil inlet runner of each inverting module 10 it is in parallel and with pressure regulation mould
The oil outlet of block 40 is connected to；The overflow module 50 is also mounted in the second transfer block 70.The inverting module 10, first is transferred
Being bolted between block 60, the second transfer block 70, cut-off module 20, voltage regulating module 40 and overflow module 50 is one
Body.The inverting module 10, the first transfer block 60, the second transfer block 70, cut-off module 20, voltage regulating module 40 and overflow module
Runner interface between 50 is equipped with end face seal.The hydraulic station of the utility model takes total oil way valve block thinking, that is,
It is distributed into and out of oil circuit by valve block, each control valve group and pressure regulation valve group all use panel connection type and total oil path block to connect
It connects, each valve block passes through mill processing and guarantees plane finish, oil leakage phenomenon can occurs in this way to avoid connector, significantly reduce feeding
The maintenance workload of unit is protected, integral arrangement is simpler, more compact.
Preferably, as shown in figure 3, the inverting module 10 includes the first inverting module and the second inverting module, described the
One inverting module and the second inversion valve module are three position four-way directional control valve, and the cut-off module 20 is two six logical shut-off valves,
Work oil inlet A1, A2 of first inverting module and the second inverting module is connected to the main oil inlet P 3 of cut-off module 20, and first
Work oil return opening B1, B2 of inverting module and the second inverting module connect with two main oil return inlet Ts 3 of cut-off module 20, T4 respectively
Logical, the work oil inlet A3 of cut-off module 20 is connected to the rodless cavity of hydraulic cylinder 30, ends two work oil return openings of module 20
It is connected to the rod chamber of hydraulic cylinder 30；First inverting module and the main oil inlet P 1 of the second inverting module, P2 are connected to hydraulic pump；
First inverting module and the main oil return inlet T 1 of the second inverting module, T2 are connected to oil-recovery tank.The utility model is by multiple hydraulic cylinders
Control oil circuit be transferred on same shut-off valve, can be realized the synchronously control of multiple hydraulic cylinders, when operation, first turn on first
Inverting module and the second inverting module, are then turned on cut-off module, while can be realized multiple steel-slag sands in this way from close, avoid out
The existing nonsynchronous phenomenon of shutter motion.
As shown in Fig. 5 to 8, the inverting module specific structure of the utility model is as follows: the inverting module 10 includes first
Spool 11 and the first valve pocket 12, first spool 11 are slidably arranged in the first valve opened up on the first valve pocket 12 in the axial direction
In hole, the first annular groove, the second annular groove, third annular groove and the 4th annular groove, institute are successively arranged on first spool 11 from left to right
It states the first annular groove, the second annular groove, third annular groove and the 4th annular groove and encloses the first valve chamber 111, with the first valve opening inner wall respectively
Two valve chambers 112, third valve chamber 113 and the 4th valve chamber 114 offer on first valve pocket, 12 side wall and are connected to the first of the first valve opening
Main oil inlet runner 121, the first main work oil inlet runner 123 of oil return runner 122, first and the first work oil return runner 124, it is described
The first branch flow passage 125 and the second branch flow passage 126, and the first branch flow passage 125 and second are offered inside first valve pocket 12
The both ends of branch flow passage 126 are connected to the first valve opening inner cavity；First spool 11 is fitted to be: when the first spool 11 is located at
When left position, the first main oil inlet runner 121 is connected to by the 4th valve chamber 114 with the first work oil inlet runner 123, the first main oil return stream
Road 122 is connected to by the second valve chamber 112 with the first work oil return runner 124；When the first spool 11 is located at middle position, first it is main into
Oil stream road 121 and the first work oil inlet runner 123 disconnect, and the first main oil return runner 122 and the first work oil return runner 124 are disconnected
It opens, and the first main oil inlet runner 121 passes sequentially through third valve chamber 113, the first branch flow passage 125, the first valve chamber 111 and the first master
Oil return runner 122 is connected to；When the first spool 11 is located at right position, the first main oil inlet runner 121 passes through the second valve chamber 112 and first
The oil return runner 124 that works is connected to, and the first main oil return runner 122 passes sequentially through the 4th valve chamber 114, the second branch flow passage 126 first
Valve chamber 111 is connected to the first work oil inlet runner 123.
As shown in Fig. 9 to 12, the specific structure of the cut-off module of the utility model is as follows: the inverting module 10 includes the
Two spools 21 and the second valve pocket 22, second spool 21 are slidably arranged in second opened up on the second valve pocket 22 in the axial direction
In valve opening, the 5th annular groove, the 6th annular groove and the 7th annular groove, the five rings are successively arranged on second spool 21 from left to right
Slot, the 6th annular groove and the 7th annular groove enclose the 5th valve chamber 211, the 6th valve chamber 212 and the 7th with the inner wall of the second valve opening respectively
Valve chamber 213；The second main oil inlet runner 221, the second main oil return stream for being connected to the second valve opening are offered on second valve pocket 22
The main work of oil return runner 223, second oil inlet runner 225, the second work oil return runner 224 of road 222, third and third work oil return
Runner 226；Third branch flow passage 227, the both ends and middle part of the third branch flow passage 227 are equipped with inside second valve pocket 22
It is connected to the inner cavity of the second valve opening；Second spool 21 is fitted to be: when the second spool 21 is located at left position, second it is main into
Oil stream road 221 is main by the 6th valve chamber 212, third branch flow passage 227 and the 5th valve chamber 211 and the 7th valve chamber 213 and second
Oil return runner 222 is connected to the main oil return runner 223 of third；When the second spool 21 is located at right position, the second main oil inlet runner 221,
Second main oil return runner 222 and the main oil return runner 223 of third pass through the 6th valve chamber 212, the 5th valve chamber 211 and the 7th valve chamber respectively
213 are connected to the second work oil inlet runner 225, second work oil return runner 224 and third work oil return runner 226.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, can also make several improvements and retouch, these improve and
Retouching also should be regarded as the protection scope of the utility model.The structure that does not specifically describe and illustrate in the utility model, device
And operating method, it unless otherwise instructed and limits, is implemented according to the conventional means of this field.
Claims (10)
1. a kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders, it is characterised in that: including at least two
Inverting module (10) and a cut-off module (20), each inverting module (10) is parallel with one another, the upstream of each inverting module (10) with
Hydraulic series connection of pumps, the downstream of each inverting module (10) are connected with the cut-off module (20), the downstream of cut-off module (20)
It is connected at least two hydraulic cylinders (30)；The inverting module (10) is an integral structure with cut-off module (20) assembly.
2. the oil way valve block device according to claim 1 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: the inverting module (10) includes the first inverting module and the second inverting module, and first inverting module and second are commutated
Valve module is three position four-way directional control valve, and the cut-off module (20) is two six logical shut-off valves, the first inverting module and second
Work oil inlet A1, A2 of inverting module is connected to the main oil inlet P 3 of cut-off module (20), and the first inverting module and second changes
It is connected to, ends module (20) with two main oil return inlet Ts 3, T4 of cut-off module (20) respectively to work oil return opening B1, B2 of module
Work oil inlet A3 be connected to the rodless cavity of hydraulic cylinder (30), end module (20) two work oil return openings and hydraulic cylinder
(30) rod chamber connection；First inverting module and the main oil inlet P 1 of the second inverting module, P2 are connected to hydraulic pump；First changes
It is connected to module and the main oil return inlet T 1 of the second inverting module, T2 with oil-recovery tank.
3. the oil way valve block device according to claim 2 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: it is in series with voltage regulating module (40) between the inverting module (10) and hydraulic pump, the voltage regulating module (40) and inverting module
(10) assembly is an integral structure.
4. the oil way valve block device according to claim 3 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: it is parallel with overflow module (50) on the pipeline between the inverting module (10) and hydraulic pump, the overflow module (50)
Oil return opening is connected to oil-recovery tank.
5. the oil way valve block device according to claim 4 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: the inverting module (10) includes the first spool (11) and the first valve pocket (12), and first spool (11) is in the axial direction
It is slidably arranged in the first valve opening opened up on the first valve pocket (12), is successively arranged on first spool (11) from left to right
One annular groove, the second annular groove, third annular groove and the 4th annular groove, first annular groove, the second annular groove, third annular groove and the 4th annular groove point
The first valve chamber (111), the second valve chamber (112), third valve chamber (113) and the 4th valve chamber are not enclosed with the first valve opening inner wall
(114), the first main oil inlet runner (121) for being connected to the first valve opening, the first main oil return are offered on the first valve pocket (12) side wall
Runner (122), the first work oil inlet runner (123) and the first work oil return runner (124), first valve pocket (12) is internal to open
Equipped with the first branch flow passage (125) and the second branch flow passage (126), and the first branch flow passage (125) and the second branch flow passage
(126) both ends are connected to the first valve opening inner cavity；First spool (11) fitted to be: when the first spool (11) are located at a left side
When position, the first main oil inlet runner (121) is connected to by the 4th valve chamber (114) with the first work oil inlet runner (123), and first leads back
Oil stream road (122) is connected to by the second valve chamber (112) with the first work oil return runner (124)；In the first spool (11) is located at
When position, the first main oil inlet runner (121) disconnects with the first work oil inlet runner (123), the first main oil return runner (122) and first
Work oil return runner (124) disconnection, and the first main oil inlet runner (121) passes sequentially through third valve chamber (113), the first branch flow passage
(125), the first valve chamber (111) is connected to the first main oil return runner (122)；When the first spool (11) is located at right position, first is main
Oil inlet runner (121) is connected to by the second valve chamber (112) with the first work oil return runner (124), the first main oil return runner (122)
The 4th valve chamber (114), (126) first valve chamber (111) of the second branch flow passage and the first work oil inlet runner (123) is passed sequentially through to connect
It is logical.
6. the oil way valve block device according to claim 5 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: the inverting module (10) includes the second spool (21) and the second valve pocket (22), and second spool (21) is in the axial direction
It is slidably arranged in the second valve opening opened up on the second valve pocket (22), is successively arranged on second spool (21) from left to right
Five annular grooves, the 6th annular groove and the 7th annular groove, the 5th annular groove, the 6th annular groove and the 7th the annular groove inner wall with the second valve opening respectively
Enclose the 5th valve chamber (211), the 6th valve chamber (212) and the 7th valve chamber (213)；Connection is offered on second valve pocket (22)
To the second main oil inlet runner (221), the second main oil return runner (222), the main oil return runner (223) of third, second of the second valve opening
It works oil inlet runner (225), the second work oil return runner (224) and third work oil return runner (226)；Second valve pocket
(22) internal to be equipped with third branch flow passage (227), the both ends and middle part of the third branch flow passage (227) with the second valve opening
Inner cavity connection；Second spool (21) fitted to be: when the second spool (21) is located at left position, the second main oil inlet runner
(221) pass through the 6th valve chamber (212), third branch flow passage (227) and the 5th valve chamber (211) and the 7th valve chamber (213) and the
Two main oil return runners (222) are connected to the main oil return runner (223) of third；When the second spool (21) is located at right position, second it is main into
Oil stream road (221), the second main oil return runner (222) and the main oil return runner (223) of third pass through the 6th valve chamber (212), the respectively
Five valve chambers (211) and the 7th valve chamber (213) and the second work oil inlet runner (225), the second work oil return runner (224) and third
Work oil return runner (226) connection.
7. the oil way valve block device according to claim 6 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: each inverting module (10) affixed, first transfer block (60) by the first transfer block (60) and cut-off module (20)
Inside be equipped with the first oil circuit (61) in parallel, first oil circuit (61) in parallel by the work oil inlet runner parallel connection of each inverting module (10) simultaneously
It is connected to the main oil inlet runner of cut-off module (20).
8. the oil way valve block device according to claim 7 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: each inverting module (10) affixed, second transfer block by the second transfer block (70) and a voltage regulating module (40)
(70) be equipped with the second oil circuit (71) in parallel in, the described second oil circuit (71) in parallel by the main oil inlet runner of each inverting module (10) simultaneously
Join and is connected to the oil outlet of voltage regulating module (40)；The overflow module (50) is also mounted on the second transfer block (70).
9. the oil way valve block device according to claim 8 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: the inverting module (10), the first transfer block (60), the second transfer block (70), cut-off module (20), voltage regulating module (40) with
And it is bolted and is integrated between overflow module (50).
10. the oil way valve block device according to claim 9 for being used for a hydraulic station control multiple hydraulic cylinders, feature exist
In: the inverting module (10), the first transfer block (60), the second transfer block (70), cut-off module (20), voltage regulating module (40) with
And the runner interface between overflow module (50) is equipped with end face seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920127731.0U CN209444647U (en) | 2019-01-25 | 2019-01-25 | A kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920127731.0U CN209444647U (en) | 2019-01-25 | 2019-01-25 | A kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209444647U true CN209444647U (en) | 2019-09-27 |
Family
ID=68018909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920127731.0U Withdrawn - After Issue CN209444647U (en) | 2019-01-25 | 2019-01-25 | A kind of oil way valve block device for a hydraulic station control multiple hydraulic cylinders |
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| CN (1) | CN209444647U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107915A (en) * | 2021-03-17 | 2021-07-13 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic control valve group and anchor rod drilling machine |
-
2019
- 2019-01-25 CN CN201920127731.0U patent/CN209444647U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107915A (en) * | 2021-03-17 | 2021-07-13 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic control valve group and anchor rod drilling machine |
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Address after: 230041 No.1 Shuguang Road, Baohe District, Hefei City, Anhui Province Patentee after: Anhui water conservancy and Hydropower Engineering Testing Co.,Ltd. Address before: 230041 No.1 Shuguang Road, Baohe District, Hefei City, Anhui Province Patentee before: ENGINEERING QUALITY INSPECTION INSTITUTE OF ANHUI WATER RESOURCES AND HYDROPOWER SURVEY AND DESIGN INSTITUTE |
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