CN214577999U - Valve block assembly device - Google Patents
Valve block assembly device Download PDFInfo
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- CN214577999U CN214577999U CN202023336850.9U CN202023336850U CN214577999U CN 214577999 U CN214577999 U CN 214577999U CN 202023336850 U CN202023336850 U CN 202023336850U CN 214577999 U CN214577999 U CN 214577999U
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Abstract
The utility model provides a valve block assembly device, concretely relates to generator rotor technical field. The valve block assembly apparatus comprises: an electro-hydraulic directional valve for selectively passing hydraulic oil to the hydraulic motor; the electro-hydraulic reversing valve, the proportional speed regulating valve and the hydraulic motor are sequentially connected, and the proportional speed regulating valve is used for regulating the flow of hydraulic oil to the hydraulic motor; and the amplifier is connected with the proportional speed control valve in a control way and is used for amplifying a control signal for the proportional speed control valve so as to control the flow of the proportional speed control valve in real time through an analog electric signal. Thereby realize according to the real-time condition of generator rotor barring in-process and through the corresponding flow velocity of amplifier regulation proportional speed control valve to control hydraulic motor's rotational speed, thereby avoid poor and cause improper to rotor barring drive control to hydraulic motor control sensitivity, and cause the rotor to take place at the easy impaired problem of barring in-process.
Description
Technical Field
The utility model relates to a generator technical field particularly, relates to a valve block assembly device.
Background
The generator of current power plant needs to drive the generator rotor under the exogenic action and rotate to generate electricity and produce the electric energy, and the generator need park, that is to say the generator rotor stall, in order regularly to overhaul the maintenance, and after aforementioned overhaul the maintenance, need at first carry out the barring to the generator, whether have the card to die and the circumstances that the resistance increases in order to detect and judge the load (being machinery or transmission part) that is driven by the rotor, thereby can not make the start load grow of rotor and damage the generator.
However, in the conventional generator, the rotor is easily damaged in the turning process due to improper control of the turning driving device in the turning process. In addition, the conventional barring gear driving device also has the problem of easy damage in the using process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the rotor is easy to be damaged in the turning process due to improper control of the existing turning driving device to a certain extent; in addition, the conventional barring gear driving device also has the problem of easy damage in the using process.
Therefore, the utility model provides a valve block assembly device for the rotational speed of the hydraulic motor of control hydraulic pressure barring gear, hydraulic motor is used for driving generator rotor barring, include:
an electro-hydraulic directional valve for selectively passing hydraulic oil to the hydraulic motor;
the electro-hydraulic reversing valve, the proportional speed regulating valve and the hydraulic motor are sequentially connected, and the proportional speed regulating valve is used for regulating the flow of hydraulic oil to the hydraulic motor; and
and the amplifier is connected with the proportional speed control valve in a control way and is used for amplifying a control signal for the proportional speed control valve so as to control the flow of the proportional speed control valve in real time through an analog electric signal.
Further, the valve block assembly device also comprises a first pipeline,
the first pipeline is connected with a plurality of oil holes of a gearbox body of the hydraulic barring gear, the generator rotor, the gearbox and the hydraulic motor are sequentially in transmission connection, a plurality of transmission shafts are arranged in the gearbox, and the plurality of oil holes are formed in the connection position of the transmission shafts and the gearbox body.
Further, the valve block assembly device further comprises a switch valve device, and the switch valve device is installed on the first pipeline.
Furthermore, the switching valve device comprises a first reversing valve and a second reversing valve, and the first reversing valve and the second reversing valve are sequentially connected in series on the first pipeline.
Furthermore, the valve block assembly device further comprises a speed regulating valve device, and the speed regulating valve device and the switch valve device are connected in series on the first pipeline.
Further, the speed regulating valve device comprises a second one-way valve, a third one-way valve, a fourth one-way valve, a fifth one-way valve and a speed regulating valve,
the output end of the second one-way valve and the input end of the third one-way valve are connected to the same oil port of the second reversing valve in parallel, the output end of the third one-way valve is connected with the input end of the speed regulating valve, the output end of the fifth one-way valve is connected with the input end of the speed regulating valve, the output end of the speed regulating valve is respectively connected with the input end of the second one-way valve and the input end of the fourth one-way valve, and the output end of the fourth one-way valve and the input end of the fifth one-way valve are simultaneously connected with the plurality of oil holes;
the first reversing valve and the second reversing valve are respectively connected with an oil tank.
Furthermore, the valve block assembly device further comprises a base, the electro-hydraulic reversing valve, the proportional speed regulating valve, the speed regulating valve device and the switch valve device are installed on the base, a plurality of oil passing channels are formed in the base, and the electro-hydraulic reversing valve, the proportional speed regulating valve, the speed regulating valve device and the switch valve device are respectively communicated with the corresponding hydraulic motors and the corresponding oil holes through the plurality of oil passing channels.
Further, the base is the cuboid structure, the length direction level of base sets up, the electricity liquid switching-over valve with proportional speed control valve installs on the top surface of base, the speed control valve device with the switching valve device is installed one end department of the length direction of base.
Further, the valve block assembly device further comprises a second pipeline, the second pipeline is communicated with the hydraulic motor, a sixth one-way valve is arranged on the second pipeline, and the output end of the sixth one-way valve is communicated with the hydraulic motor.
Furthermore, the proportional speed regulating valve comprises a throttle valve and a fixed-value pressure reducing valve, the input end of the throttle valve is connected with the electro-hydraulic reversing valve, the output end of the throttle valve is connected with the input end of the fixed-value pressure reducing valve, and the output end of the fixed-value pressure reducing valve is connected with the hydraulic motor;
the valve block assembly device further comprises a first one-way valve, the input end of the first one-way valve is connected with the output end of the constant value pressure reducing valve, and the output end of the first one-way valve is connected with the input end of the throttle valve.
The inventor finds that the main reason why the rotor is easily damaged in the turning process due to improper control of the existing turning driving device is that the rotation speed of the existing hydraulic motor is controlled through a mechanical mode, for example, the flow of hydraulic oil leading to the hydraulic motor in a hydraulic pipeline is adjusted through an adjusting rod, so that the rotation speed of the hydraulic motor is adjusted, but the mechanical adjusting mode is easy to cause the problem that the clamping is dead and the adjusting piece is easy to lose so as to influence the adjusting precision, and the rotor is easily damaged in the turning process. On the basis of the discovery, the inventor of the utility model utilizes the structural characteristics of the electro-hydraulic directional valve, and the flow passing through the electro-hydraulic directional valve exceeds the flow of the normal working allowable range of the common electromagnetic directional valve, thereby realizing providing sufficient driving force for the hydraulic motor, and simultaneously utilizing the reversing characteristics of the electro-hydraulic directional valve, the electro-hydraulic directional valve plays the role of a switch, thereby ensuring the use safety of the hydraulic motor; meanwhile, the amplifier is connected with the proportional speed control valve in a control mode by utilizing the characteristic that the proportional speed control valve is used for adjusting the flow of hydraulic oil to the hydraulic motor, the control signal sent by the console is amplified by the amplifier, and the flow of the proportional speed control valve is continuously controlled by the analog electric signal in real time, so that the corresponding flow and flow rate of the proportional speed control valve are adjusted by the amplifier according to the real-time condition of the turning process of the rotor of the generator, the rotating speed of the hydraulic motor is controlled, and the problem that the control sensitivity of the hydraulic motor is influenced due to the fact that the rotor is not properly driven and controlled due to the fact that the rotor is easily damaged in the turning process due to the fact that a mechanical control mode is easily blocked is avoided.
Furthermore, the corresponding transmission shaft is jacked up through the high-pressure oil via the first pipeline and the plurality of oil holes, so that the transmission shaft and the gearbox body are arranged in a clearance mode, and the transmission shaft in the gearbox is prevented from being seriously damaged by friction force. Thereby the life of transmission shaft in the gearbox has been guaranteed.
Drawings
FIG. 1 is a schematic and diagrammatic illustration of the valve block assembly apparatus of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the valve block assembly device according to the embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Also, in the drawings, the Z-axis represents a vertical, i.e., up-down position, and a positive direction of the Z-axis (i.e., an arrow direction of the Z-axis) represents up, and a negative direction of the Z-axis (i.e., a direction opposite to the positive direction of the Z-axis) represents down;
the X axis in the drawings indicates the length direction along the base;
it should also be noted that the foregoing Z-axis and X-axis representations are merely intended to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
It should be noted that the term "connect" in this embodiment includes a detachable connection and a non-detachable connection, that is, the term "connect" in this embodiment may be a detachable connection or a non-detachable connection, and the non-detachable connection may also be referred to as a fixed connection; however, if the connection is not explicitly indicated as detachable connection or non-detachable connection in this embodiment, the detachable connection and the non-detachable connection are considered to be applicable, and the specific use of the detachable connection or the non-detachable connection may be determined according to specific implementation conditions of a specific implementation process, so that the "connection" will not be correspondingly explained in the following of this embodiment.
In addition, the "setting" mentioned in the present embodiment includes the case of mounting, fixing, and connecting, that is, the "setting" mentioned in the present embodiment may be at least one of mounting, fixing, and connecting, and therefore, the "setting" will not be explained accordingly in the following of the present embodiment.
Referring to fig. 1, the present embodiment provides a valve block assembly apparatus for controlling a rotational speed of a hydraulic motor of a hydraulic barring apparatus, the hydraulic motor for driving a generator rotor barring, comprising:
an electro-hydraulic directional valve 100 for selectively passing hydraulic oil to the hydraulic motor;
the electro-hydraulic reversing valve 100, the proportional speed regulating valve 200 and the hydraulic motor are sequentially connected, and the proportional speed regulating valve 200 is used for regulating the flow of hydraulic oil to the hydraulic motor; and
and the amplifier is in control connection with the proportional speed control valve 200 and is used for amplifying a control signal of the control console to the proportional speed control valve 200, amplifying the control signal and converting the control signal into an analog electric signal so as to control the flow of the proportional speed control valve 200 in real time through the analog electric signal.
The inventor finds that the main reason why the rotor is easily damaged in the turning process due to improper control of the existing turning driving device is that the rotation speed of the existing hydraulic motor is controlled through a mechanical mode, for example, the flow of hydraulic oil leading to the hydraulic motor in a hydraulic pipeline is adjusted through an adjusting rod, so that the rotation speed of the hydraulic motor is adjusted, but the mechanical adjusting mode is easy to cause the problem that the clamping is dead and the adjusting piece is easy to lose so as to influence the adjusting precision, and the rotor is easily damaged in the turning process. On the basis of the discovery, the inventor of the utility model utilizes the structural characteristics of the electro-hydraulic directional valve 100, so that the flow passing through the electro-hydraulic directional valve exceeds the flow of the normal working allowable range of the common electromagnetic directional valve, thereby providing sufficient driving force for the hydraulic motor, and simultaneously utilizes the reversing characteristics of the electro-hydraulic directional valve 100 to ensure the function of the switch of the electro-hydraulic directional valve 100, thereby ensuring the use safety of the hydraulic motor; meanwhile, the characteristic that the proportional speed control valve 200 regulates the flow of hydraulic oil to the hydraulic motor is utilized, the amplifier is connected with the proportional speed control valve 200 in a control mode, a control signal to the proportional speed control valve 200 is amplified through the amplifier, and the flow of the proportional speed control valve 200 is continuously controlled in real time through an analog electric signal, so that the corresponding flow and flow rate of the proportional speed control valve 200 is regulated through the amplifier according to the real-time condition of the rotor turning process of the generator, the rotating speed of the hydraulic motor is controlled, and the problem that the rotor is easy to damage in the turning process due to improper driving control of the rotor turning caused by the fact that the mechanical control is easy to block or the flow control sensitivity is poor due to the loss of mechanical parts after the use for a period of time is solved.
Referring to fig. 1, preferably, the valve block assembly apparatus further comprises a first conduit,
the first pipeline is connected with a plurality of oil holes of a gearbox body of the hydraulic barring gear, the generator rotor, the gearbox and the hydraulic motor are sequentially connected in a transmission way, a plurality of transmission shafts are arranged in the gearbox, a plurality of oil holes are formed in the connecting part of the transmission shafts and the gearbox body,
high-pressure oil passes through the first pipeline and the oil holes to enable the corresponding transmission shaft and the gearbox body to be arranged in a clearance mode.
In this embodiment, the high-pressure oil jacks up the corresponding transmission shaft through the first pipeline and the plurality of oil holes, so that the transmission shaft and the transmission case body are arranged in a clearance, and the transmission shaft in the transmission case is prevented from being seriously damaged by friction force. Thereby the life of transmission shaft in the gearbox has been guaranteed.
It should be noted that, in this embodiment, the transmission shaft and the transmission case may be cooperatively connected by a sliding bearing, and the oil hole may be an oil hole of the sliding bearing.
The "a plurality of oil holes to jack up the corresponding transmission shafts" may be to jack up one transmission shaft, such as a power input shaft of a transmission, because the power input shaft of the transmission has a high rotation speed, friction between the shaft and a surrounding transmission body during rotation must be sufficiently reduced, so as to ensure the service life of the shaft; however, a common bearing is difficult to guide and prevent abrasion, so that the power input shaft and the transmission body are arranged in a clearance manner by using high-pressure oil.
Preferably, the valve block assembly further comprises a switching valve device mounted on the first pipeline.
Referring to fig. 1, preferably, the switching valve device includes a first direction valve 310 and a second direction valve 320, and the first direction valve 310 and the second direction valve 320 are sequentially disposed in series on the first pipeline.
The first reversing valve 310 and the second reversing valve 320 are sequentially arranged on the first pipeline in series, so that high-pressure oil enters a plurality of oil holes only under the condition that the first reversing valve 310 and the second reversing valve 320 are simultaneously communicated, and the safe operation of the transmission shaft is ensured.
That is, only when the first direction switching valve 310 and the second direction switching valve 320 are both turned on, the high-pressure oil enters the transmission and can cooperate with the rotation of the transmission; therefore, the problem that the safe use of the gearbox is influenced due to the fact that the transmission shaft and gears on the transmission shaft are damaged, such as tooth punching, deviation of the transmission shaft and the like, due to the fact that the switch valve is opened by an operator due to misoperation is avoided.
The first direction valve 310 and the second direction valve 320 may be electromagnetic ball valves.
Preferably, the valve block assembly device further comprises a speed regulating valve device, and the speed regulating valve device and the switch valve device are connected in series on the first pipeline.
The speed regulating valve device is used for regulating according to the running condition of a transmission shaft in the gearbox and the size of a gap between the transmission shaft and the gearbox, so that the problem that the transmission shaft is excessively eccentric is solved.
Referring to fig. 1, preferably, the speed valve device includes a second check valve 410, a third check valve 420, a fourth check valve 430, a fifth check valve 440 and a speed valve 450,
the output end of the second check valve 410 and the input end of the third check valve 420 are connected in parallel at the same oil hole of the second reversing valve 320, the output end of the third check valve 420 is connected with the input end of the speed regulating valve 450, the output end of the fifth check valve 440 is connected with the input end of the speed regulating valve 450, the output end of the speed regulating valve 450 is connected with the input end of the second check valve 410 and the input end of the fourth check valve 430, and the output end of the fourth check valve 430 and the input end of the fifth check valve 440 are connected with a plurality of oil holes at the same time;
the first direction valve 310 and the second direction valve 320 are respectively connected to a tank.
The speed regulating valve device is integrally designed through the arrangement mode of the second one-way valve 410, the third one-way valve 420, the fourth one-way valve 430, the fifth one-way valve 440 and the speed regulating valve 450, the flow control of hydraulic oil entering and exiting the first pipeline of the gearbox can be realized only through one speed regulating valve 450 matched with a plurality of simple one-way valves, and therefore the stable transmission of the high-pressure oil through the first pipeline is ensured.
It should be noted that, after the turning is finished, the first direction valve 310 and the second direction valve 320 are both closed, so that the oil entering the transmission case flows back to the oil tank after passing through the speed regulating valve 450 and the first direction valve 310, and the high-pressure oil pumped by the high-pressure oil pump also flows back to the oil tank after being diverted by the second direction valve 320.
In addition, the arrangement of the second check valve 410, the third check valve 420, the fourth check valve 430, the fifth check valve 440 and the speed regulating valve 450 ensures that the high-pressure oil can only flow to the transmission shaft in one direction, thereby preventing the backflow of the hydraulic oil and the instability of the oil pressure of the transmission shaft, particularly preventing the instability of the flow direction and the flow rate of the high-pressure oil caused by the misoperation of an operator.
Referring to fig. 2, preferably, the valve block assembly further includes a base 700, the electro-hydraulic directional valve 100, the proportional speed control valve 200, the speed control valve device, and the switch valve device are mounted on the base 700, a plurality of oil passing channels are formed in the base 700, and the electro-hydraulic directional valve 100, the proportional speed control valve 200, the speed control valve device, and the switch valve device are respectively communicated with the corresponding hydraulic motor and the corresponding oil holes through the plurality of oil passing channels.
Through the setting of base 700, make each valve structure of whole valve block assembly device, for example, the electricity is turned over valve 100, proportional speed control valve 200 the speed control valve device with the switch valve device fully cooperates with each installation face of base 700, realizes the design of integrating, reduces the appearance volume of whole valve block assembly device. Thereby allowing the valve block assembly to be placed in any desired position.
Referring to fig. 2, preferably, the base 700 is a rectangular parallelepiped structure, the length direction of the base 700 is horizontally arranged, the electro-hydraulic directional control valve 100 and the proportional speed control valve 200 are installed on the top surface of the base 700, and the speed control valve device and the switching valve device are installed at one end of the length direction of the base 700.
Because the electro-hydraulic directional valve 100 and the proportional speed regulating valve 200 are the core of the whole valve block assembly device, the electro-hydraulic directional valve and the proportional speed regulating valve are arranged at the top, so that the installation is convenient, and the maintenance is effective.
Referring to fig. 1, preferably, the valve block assembly device further includes a second pipeline, the second pipeline is communicated with the hydraulic motor, the second pipeline is provided with a sixth check valve 600, and an output end of the sixth check valve 600 is communicated with the hydraulic motor.
Lubricating oil can be firstly pumped into the hydraulic motor through the second pipeline, so that the hydraulic motor is ensured to have good lubricating performance before working, and then after the hydraulic motor is fully lubricated, the hydraulic motor is driven to rotate by reversing the direction of the electro-hydraulic reversing valve 100. In order to ensure the smooth rotation of the hydraulic motor, the sixth check valve 600 is provided to prevent the high-pressure oil from flowing back to the oil tank through the second pipeline before entering the hydraulic motor, or the second pipeline has a fluctuation influence on the operation of the hydraulic motor, thereby ensuring the smooth operation of the turning gear.
Referring to fig. 1, preferably, the proportional speed control valve 200 includes a throttle valve and a fixed-value pressure reducing valve, an input end of the throttle valve is connected with the electro-hydraulic directional control valve 100, an output end of the throttle valve is connected with an input end of the fixed-value pressure reducing valve, and an output end of the fixed-value pressure reducing valve is connected with the hydraulic motor;
the valve block assembly device further comprises a first one-way valve 210, wherein the input end of the first one-way valve 210 is connected with the output end of the constant value pressure reducing valve, and the output end of the first one-way valve 210 is connected with the input end of the throttle valve.
In this embodiment, through the cooperation of choke valve and definite value relief pressure valve use, prevent that hydraulic motor operation in-process from appearing the load fluctuation, and influence hydraulic motor's rotational speed, consequently cooperate each other through choke valve and definite value relief pressure valve, realize hydraulic motor's steady operation, through the setting of first check valve 210, play further steady voltage effect simultaneously.
In fig. 1, P is the oil inlet end, M is the end oil delivery end to the hydraulic motor, E is the output end to the transmission, and T is the oil return end.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, which will fall into the scope of the present disclosure.
Claims (10)
1. A valve block assembly apparatus for controlling the rotational speed of a hydraulic motor of a hydraulic barring apparatus, the hydraulic motor for driving a generator rotor barring, comprising:
an electro-hydraulic directional valve (100) for selectively passing hydraulic oil to the hydraulic motor;
the proportional speed regulating valve (200), the electro-hydraulic directional valve (100), the proportional speed regulating valve (200) and the hydraulic motor are connected in sequence, and the proportional speed regulating valve (200) is used for regulating the flow of hydraulic oil to the hydraulic motor; and
and the amplifier is in control connection with the proportional speed regulating valve (200) and is used for amplifying a control signal of the proportional speed regulating valve (200) so as to control the flow of the proportional speed regulating valve (200) in real time through an analog electric signal.
2. The valve block assembly apparatus of claim 1, further comprising a first conduit,
the first pipeline is used for being connected with a plurality of oil holes of a gearbox body of the hydraulic barring gear, the generator rotor, the gearbox and the hydraulic motor are sequentially in transmission connection, a plurality of transmission shafts are arranged in the gearbox, and the plurality of oil holes are formed in the connection position of the transmission shafts and the gearbox body.
3. The valve block assembly apparatus of claim 2, further comprising a switching valve apparatus mounted on the first conduit.
4. The valve block assembly apparatus of claim 3,
the switching valve device comprises a first reversing valve (310) and a second reversing valve (320), and the first reversing valve (310) and the second reversing valve (320) are sequentially arranged on the first pipeline in series.
5. The valve block assembly arrangement of claim 4, further comprising a speed valve (450) arrangement, the speed valve (450) arrangement and the switching valve arrangement being in series on the first line.
6. The valve block assembly arrangement of claim 5, wherein the speed valve (450) arrangement comprises a second one-way valve (410), a third one-way valve (420), a fourth one-way valve (430), a fifth one-way valve (440), and a speed valve (450),
the output end of the second one-way valve (410) and the input end of the third one-way valve (420) are connected to the same oil port of the second reversing valve (320) in parallel, the output end of the third one-way valve (420) is connected with the input end of the speed regulating valve (450), the output end of the fifth one-way valve (440) is connected with the input end of the speed regulating valve (450), the output end of the speed regulating valve (450) is connected with the input end of the second one-way valve (410) and the input end of the fourth one-way valve (430) respectively, and the output end of the fourth one-way valve (430) and the input end of the fifth one-way valve (440) are connected with a plurality of oil holes simultaneously;
the first reversing valve (310) and the second reversing valve (320) are respectively connected with an oil tank.
7. The valve block assembly device according to claim 6, further comprising a base (700), wherein the electro-hydraulic directional valve (100), the proportional speed control valve (200), the speed control valve (450) device and the switch valve device are mounted on the base (700), a plurality of oil passing channels are formed in the base (700), and the electro-hydraulic directional valve (100), the proportional speed control valve (200), the speed control valve (450) device and the switch valve device are respectively communicated with the corresponding hydraulic motor and the corresponding oil holes through the plurality of oil passing channels.
8. The valve block assembly device according to claim 7, wherein the base (700) is a rectangular parallelepiped structure, the length direction of the base (700) is horizontally arranged, the electro-hydraulic directional valve (100) and the proportional speed regulating valve (200) are installed on the top surface of the base (700), and the speed regulating valve (450) device and the switching valve device are installed at one end of the length direction of the base (700).
9. Valve block assembly device according to any one of claims 1 to 8, further comprising a second line communicating with the hydraulic motor, the second line being provided with a sixth one-way valve (600), the output of the sixth one-way valve (600) communicating with the hydraulic motor.
10. The valve block assembly apparatus of any one of claims 1 to 8,
the proportional speed regulating valve (200) comprises a throttle valve and a fixed-value reducing valve, the input end of the throttle valve is connected with the electro-hydraulic reversing valve (100), the output end of the throttle valve is connected with the input end of the fixed-value reducing valve, and the output end of the fixed-value reducing valve is connected with the hydraulic motor; the valve block assembly device further comprises a first check valve (210), the input end of the first check valve (210) is connected with the output end of the constant value pressure reducing valve, and the output end of the first check valve (210) is connected with the input end of the throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023336850.9U CN214577999U (en) | 2020-12-31 | 2020-12-31 | Valve block assembly device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023336850.9U CN214577999U (en) | 2020-12-31 | 2020-12-31 | Valve block assembly device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214577999U true CN214577999U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023336850.9U Active CN214577999U (en) | 2020-12-31 | 2020-12-31 | Valve block assembly device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214577999U (en) |
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2020
- 2020-12-31 CN CN202023336850.9U patent/CN214577999U/en active Active
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