CN204297964U - Fender guard and hoisting crane - Google Patents
Fender guard and hoisting crane Download PDFInfo
- Publication number
- CN204297964U CN204297964U CN201420306779.5U CN201420306779U CN204297964U CN 204297964 U CN204297964 U CN 204297964U CN 201420306779 U CN201420306779 U CN 201420306779U CN 204297964 U CN204297964 U CN 204297964U
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- control valve
- directional control
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- pressure sensor
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Abstract
The utility model discloses a kind of fender guard and hoisting crane, relate to engineering machinery field, for solving pressure sensor self in prior art, the safety problem loosening and bring being installed.This fender guard comprises hydraulic two-way lock, directional control valve and pressure sensor; First oil outlet of hydraulic two-way lock is communicated with the rodless cavity of hydraulic ram, and the second oil outlet is communicated with the rod chamber of hydraulic ram; First hydraulic fluid port of directional control valve is communicated with the rodless cavity of hydraulic ram, and the second hydraulic fluid port of directional control valve is communicated with pressure sensor; Wherein, when directional control valve and pressure sensor are in the state of being tightly connected, the oil circuit between the first hydraulic fluid port of directional control valve and the second hydraulic fluid port of directional control valve is communicated with; When directional control valve and pressure sensor are in non-tight coupled condition, the oil circuit cut-off between the first hydraulic fluid port of directional control valve and the second hydraulic fluid port of directional control valve.Above-mentioned fender guard can be installed at pressure sensor and occur playing latch-up protection effect when loosening.
Description
Technical field
The utility model relates to engineering machinery field, is specifically related to a kind of fender guard and hoisting crane.
Background technology
See Fig. 1 and Fig. 2, at present, many Vertical Cylinders 21 of crane are all equipped with pressure sensor 25, detect the pressure in Vertical Cylinders 21 in real time, avoid crane support Vertical Cylinders 21 locking pressure in hoisting process excessive, cause Vertical Cylinders 21 to damage, even Vertical Cylinders 21 retract, produce the grave accident such as overturning.Hoisting crane is when lift heavy, and the force value detected is transferred to control cabin by pressure sensor 25, as long as operator's compartment of getting on the bus when four Vertical Cylinders 21 have to reach the force value of setting will be reported to the police.If pressure sensor 25 loosens in craning weight of same process, the pressure oil in Vertical Cylinders 21 may leak from the installation site of pressure sensor 25, causes Vertical Cylinders 21 internal pressure to decline, and has danger of overturning.
In prior art, for preventing hydraulic two-way lock 26 and pressure sensor 25 to be collided and to damage, can fender guard be set.See Fig. 1, fender guard mainly comprises protective case 24, pressure sensor 25, hydraulic two-way lock 26, pickup wire 27.Protective case 24 is located at the cylinder bottom of Vertical Cylinders 21.Wherein the concrete principle of hydraulic two-way lock 26 as shown in Figure 2.
The control principle of hydraulic two-way lock:
As shown in Figure 2, when the obstructed pressure oil of A, B hydraulic fluid port, the function of two hydraulic control one-way valves is the same with common check valve, and by the hydraulic oil locking of C, D hydraulic fluid port, namely fluid cannot flow to A mouth from C mouth, D mouth flows to B mouth, thus plays locking effect.When A mouth leads to pressure oil, pressure oil flows to C mouth from A mouth, and pressure oil is oppositely opened by the hydraulic control one-way valve of oil circuit control by BD road simultaneously, if now D mouth pressure is greater than B mouth, then hydraulic oil can flow to B mouth from D mouth.When B mouth leads to pressure oil, situation is contrary with A mouth.
Vertical Cylinders and accessory structure are as shown in Figure 1.The effect of hydraulic two-way lock 26 Lock oil cylinder working-pressure, needs Vertical Cylinders 21 to stretch out before crane hanging component, by large for locked for the fluid oil cylinder at Vertical Cylinders 21 chamber 23 and oil cylinder loculus 22 after Vertical Cylinders 21 stretches out, prevent Vertical Cylinders 21 from retracting.Pressure sensor 25 be threaded connection be assemblied in Vertical Cylinders 21 cylinder bottom on, communicate with the large chamber 23 of the oil cylinder of Vertical Cylinders 21, in real time the operation pressure in large for oil cylinder in hoisting process chamber 23 is passed to by pickup wire 27 control cabin of getting on the bus, when pressure exceedes the maxim of control system setting, warning reminding operator.Visible, herein for preventing pressure sensor 25 to be in use damaged by collision, designing an iron protective case 24 and pressure sensor 25 and hydraulic two-way lock 26 are surrounded, protective case 24 is opened an aperture and passes through for pickup wire 27 and hydraulic tubing.
Vertical Cylinders: the hydraulic ram of dominant project crane chassis supporting leg movement in vertical direction, for bearing the pressure of vertical direction in propping works hoisting crane own wt and working process thereof.
Hydraulic ram: be, in hydraulic efficiency gear, hydraulic energy is converted to mechanical energy, realizes straight reciprocating motion or swings reciprocating power element.
Pressure sensor: pressure is converted to the sensor that electric signal exports.
Hydraulic two-way lock: the hydraulic valve that hydraulic two-way lock is made up of two hydraulic control one-way valves, is commonly used for the locking of Vertical Cylinders in crane.
Check valve: check valve only allows liquid to flow to a direction flowing, and do not allow the valve of counter-flow.
Locking pressure: in crane lifting operation process, the large chamber of passive Vertical Cylinders of getting off forms the effect of oil liquid pressure due to support reaction effect.
Pressure oil: be referred to as pressure oil from prexxure of the hydraulic pump hydraulic fluid port to the hydraulic oil pipeline hydraulic valve and power element in hydraulic efficiency pressure system, it has higher pressure, can drive power element work.
Contriver finds, at least there is following problems in prior art: only consider in prior art that pressure sensor is subject to external impact to damage protection, do not consider that pressure sensor themselves loose causes oil cylinder to leak.When being threaded through trembleing loosening for a long time of pressure sensor and Vertical Cylinders, hydraulic oil can from the gap leakage of oil that is threaded, and causes Vertical Cylinders can not locking and automatic retraction, have overturn dangerous.
Utility model content
One of them object of the present utility model proposes a kind of fender guard and hoisting crane, for improving the safety that pressure sensor uses.
Many technique effects that the utility model optimal technical scheme can produce will describe in detail later.
For achieving the above object, the utility model provides following technical scheme:
The utility model provides a kind of fender guard, and it comprises hydraulic two-way lock, directional control valve and pressure sensor;
First oil outlet of described hydraulic two-way lock is communicated with the rodless cavity of hydraulic ram, and the second oil outlet of described hydraulic two-way lock is communicated with the rod chamber of hydraulic ram;
First hydraulic fluid port of described directional control valve is communicated with the rodless cavity of described hydraulic ram, and the second hydraulic fluid port of described directional control valve is communicated with described pressure sensor;
Wherein, when described directional control valve and described pressure sensor are in the state of being tightly connected, the oil circuit between the first hydraulic fluid port of described directional control valve and the second hydraulic fluid port of described directional control valve is communicated with; When described directional control valve and described pressure sensor are in non-tight coupled condition, the oil circuit cut-off between the first hydraulic fluid port of described directional control valve and the second hydraulic fluid port of described directional control valve.
In preferred or optional embodiment, described directional control valve is two position two-way valve.
In preferred or optional embodiment, described directional control valve also has the first fluid control end, the second fluid control end and spring control end;
First hydraulic fluid port of described directional control valve is communicated with by throttling device with between the rodless cavity of described hydraulic ram, second hydraulic fluid port of described directional control valve is communicated with described pressure sensor, first fluid control end of described directional control valve is also communicated with the rodless cavity of described hydraulic ram, and the second fluid control end of described directional control valve is communicated with described pressure sensor; The spring control end of described directional control valve and the second fluid control end of described directional control valve are positioned at the homonymy of described directional control valve.
In preferred or optional embodiment, described throttling device comprises throttle pipe and is arranged on the cutoff port on described throttle pipe.
In preferred or optional embodiment, described throttling device comprises the first connection pipe, the second connection pipe and adaptor union, and described adaptor union is connected between described first connection pipe and described second connection pipe;
The flow area of described adaptor union is less than the flow area of described first connection pipe and described second connection pipe.
In preferred or optional embodiment, fender guard also comprises protective case; Described protective case is located at the outside of described hydraulic two-way lock, described directional control valve and described pressure sensor;
The side of described protective case offers through hole.
In preferred or optional embodiment, described protective case is the protective case of metal material.
In preferred or optional embodiment, the second hydraulic fluid port of described directional control valve is connected with described pressure sensor is detachable and is communicated with.
The utility model also provides a kind of hoisting crane, comprises the fender guard that hydraulic ram and the arbitrary technical scheme of the utility model provide.
In preferred or optional embodiment, the protective case of described fender guard is connected with the cylinder bottom of described hydraulic ram is detachable.
Based on technique scheme, the utility model embodiment at least can produce following technique effect:
In technique scheme, whether directional control valve is according to pressure sensor the state of being tightly connected and adjusts control position, if pressure sensor is in the state of being tightly connected, oil circuit between first hydraulic fluid port of directional control valve and the second hydraulic fluid port of directional control valve is communicated with, oil pressure in the rodless cavity of hydraulic ram can be passed to pressure sensor via above-mentioned oil circuit, to realize the measurement to the oil pressure in the rodless cavity of hydraulic ram.If loosening appears in the installation of pressure sensor, so pressure sensor is in non-tight coupled condition, oil circuit cut-off between first hydraulic fluid port of directional control valve and the second hydraulic fluid port of directional control valve, oil pressure in the rodless cavity of hydraulic ram can not be passed to pressure sensor via above-mentioned oil circuit, namely achieved the effect of the locking oil circuit to hydraulic ram rodless cavity fluid by directional control valve, ensure the safety that hydraulic ram uses.The fender guard that technique scheme provides, can when loosening appears in the installation of pressure sensor self, timely locking, the safety used to protect hydraulic ram.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of Vertical Cylinders and protective case in prior art;
Fig. 2 is the principle schematic of hydraulic two-way lock in Fig. 1;
The structural representation of the Vertical Cylinders that Fig. 3 provides for the utility model embodiment and protective case;
Fig. 4 is the structure enlarged diagram of fender guard and hydraulic two-way lock in Fig. 3.
Detailed description of the invention
Content of the present utility model and the distinctive points between the utility model and prior art can be understood below with reference to accompanying drawing Fig. 1 ~ Fig. 4 and word content.Hereafter by accompanying drawing and the mode enumerating embodiment more of the present utility model, the technical solution of the utility model (comprising optimal technical scheme) is described in further detail.It should be noted that: any technical characteristic in the present embodiment, any technical scheme is all one or more in the technical characteristic of plurality of optional or optional technical scheme, cannot exhaustive all alternative technical characteristics of the present utility model and alternative technical scheme in order to describe succinct to need in presents, also the embodiment being not easy to each technical characteristic all emphasizes that it is one of optional numerous embodiments, so those skilled in the art should know: any technical characteristic in the present embodiment and any technical scheme all do not limit protection domain of the present utility model, protection domain of the present utility model should comprise those skilled in the art and not pay the thinkable any alternate embodiments of creative work.
Below in conjunction with the elaboration that Fig. 3 ~ Fig. 4 carries out specifically to the technical scheme that the utility model provides, the arbitrary technological means provided by the utility model carries out technical scheme that two or more technological means any of replacing or being provided by the utility model or technical characteristic carry out mutually combining and obtain all should within protection domain of the present utility model.
The utility model embodiment provides a kind of fender guard, comprises hydraulic two-way lock 8, directional control valve 6 and pressure sensor 7.First oil outlet of hydraulic two-way lock 8 is communicated with the rodless cavity (i.e. the large chamber 3 of oil cylinder) of hydraulic ram (i.e. Vertical Cylinders 1), and the second oil outlet of hydraulic two-way lock 8 is communicated with the rod chamber (i.e. oil cylinder loculus 2) of hydraulic ram.First hydraulic fluid port of directional control valve 6 is communicated with the rodless cavity of hydraulic ram, and the second hydraulic fluid port of directional control valve 6 is communicated with pressure sensor 7.Wherein, when directional control valve 6 and pressure sensor 7 are in the state of being tightly connected, the oil circuit between the first hydraulic fluid port of directional control valve 6 and the second hydraulic fluid port of directional control valve 6 is communicated with; When directional control valve 6 and pressure sensor 7 are in non-tight coupled condition, the oil circuit cut-off between the first hydraulic fluid port of directional control valve 6 and the second hydraulic fluid port of directional control valve 6.
Directional control valve 6: be used for making the oil circuit break-make in hydraulic efficiency pressure system or change the flow direction of fluid, thus the starting of hydraulic control power element or stopping, changing the valve class of its sense of motion.
Whether directional control valve 6 is according to pressure sensor 7 state of being tightly connected and adjusts control position, if pressure sensor 7 is in the state of being tightly connected, oil circuit between first hydraulic fluid port of directional control valve 6 and the second hydraulic fluid port of directional control valve 6 is communicated with, oil pressure in the rodless cavity of hydraulic ram can be passed to pressure sensor 7 via above-mentioned oil circuit, to realize the measurement to the oil pressure in the rodless cavity of hydraulic ram.If loosening appears in the installation of pressure sensor 7, so pressure sensor 7 is in non-tight coupled condition, oil circuit cut-off between first hydraulic fluid port of directional control valve 6 and the second hydraulic fluid port of directional control valve 6, oil pressure in the rodless cavity of hydraulic ram can not be passed to pressure sensor 7 via above-mentioned oil circuit, namely achieved the effect of the locking oil circuit to hydraulic ram rodless cavity fluid by directional control valve 6, ensure the safety that hydraulic ram uses.
The fender guard that technique scheme provides, can when loosening appears in the installation of pressure sensor 7 self, timely locking, the safety used to protect hydraulic ram.
Directional control valve 6 specifically can adopt two position two-way valve.See Fig. 4, directional control valve 6, except the first above-mentioned hydraulic fluid port and the second hydraulic fluid port, also has the first fluid control end (left end namely in Fig. 4), the second fluid control end (right-hand member namely in Fig. 4) and spring the control end spring of right-hand member (namely in Fig. 4).Be communicated with by throttling device between first hydraulic fluid port of directional control valve 6 and the rodless cavity of hydraulic ram, second hydraulic fluid port of directional control valve 6 is communicated with pressure sensor 7, first fluid control end of directional control valve 6 is also communicated with the rodless cavity of hydraulic ram, and the second fluid control end of directional control valve 6 is communicated with pressure sensor 7; The spring control end of directional control valve 6 and the second fluid control end of directional control valve 6 are positioned at the homonymy of directional control valve 6.
The schematic enlarged-scale view of pressure sensor 7 fender guard and hydraulic two-way lock 8 as shown in Figure 4.Wherein the principle of work of hydraulic two-way lock 8 is see detailed introduction above, is only introduced with regard to fender guard part here.
See Fig. 4, introduce the concrete structure of pressure sensor 7 fender guard and hydraulic two-way lock 8 below:
Pressure sensor 7 and directional control valve 6 are integrated on hydraulic two-way lock 8, and the C mouth of hydraulic two-way lock 8 communicates with the large chamber of hydraulic ram (i.e. Vertical Cylinders 1), and D mouth communicates with oil cylinder loculus 2.Two-way is divided into from the C mouth hydraulic oil out in the large chamber 3 of oil cylinder, one road flows to hydraulic two-way lock 8, another road communicates with cutoff port 4, directional control valve 6, pressure sensor 7, large for oil cylinder chamber 3 pressure oil pressure is passed to pressure sensor 7, and pressure sensor 7 passes through pickup wire 9 by pressure signal transmission to control cabin.Cutoff port 4 refers to by changing flow area or length, and then regulates the aperture of the flow passed through.
Wherein, control position residing for directional control valve 6 is determined by the difference of pressure of directional control valve 6 left and right sides, with the direction shown in Fig. 4 for reference, its left pressure is the pressure of cutoff port 4 front end near hydraulic fluid port C side, and right atrial pressure is the pressure of directional control valve 6 rear end near pressure sensor 7 side and spring pressure sum.When directional control valve 6 left pressure is greater than right atrial pressure, being turned right by spool pushes away, non-return valve operational, is cut off by the oil circuit of hydraulic ram towards pressure sensor 7.When directional control valve 6 right atrial pressure is greater than left pressure, being turned left by spool pushes away, and drawn by C mouth pressure toward pressure sensor 7, pressure sensor 7 can detect C mouth oil pressure.
Wherein, when pressure sensor 7 normally works, fender guard principle of work is as follows:
When pressure sensor 7 normally works, hydraulic fluid port after directional control valve 6 is blocked by pressure sensor 7, hydraulic oil is not had to flow through from cutoff port 4, there is no loss of pressure, therefore oil pressure and right side oil pressure equal and opposite in direction on the left of valve, on the right side of directional control valve 6 spring effect under, directional control valve 6 is in right positions work, and pressure sensor 7 can detect C mouth oil pressure value.
When pressure sensor 7 loosens, fender guard principle of work is as follows:
When pressure sensor 7 loosens, have hydraulic oil and connect gap leakage of oil from sensor with directional control valve 6, the aperture of cutoff port 4 is very little, when there being hydraulic oil to flow through from cutoff port 4, has loss of pressure, on the left of directional control valve 6, oil pressure is greater than right side oil pressure, when left and right sides oil magnitude of pressure differential is greater than the pressure of controlling spring, spool is turned right movement, non-return valve operational, cut off the oil circuit leading to pressure sensor 7, play the effect of locking oil circuit.
Above-mentioned throttling device can have following two kinds of implementations: the cutoff port 4 that throttling device specifically can comprise throttle pipe and be arranged on throttle pipe, the aperture of cutoff port 4 is less than the aperture in the hole of cutoff port 4 both sides, and the hydraulic oil of flowing has loss of pressure after cutoff port 4.Or throttling device comprises the first connection pipe, the second connection pipe and adaptor union, and adaptor union is connected between the first connection pipe and the second connection pipe.The flow area of adaptor union is less than the flow area of the first connection pipe and the second connection pipe.
Herein, the second hydraulic fluid port of directional control valve 6 can be connected with pressure sensor 7 is detachable and is communicated with.
Be set to detachable connection by between pressure sensor 7 and the second hydraulic fluid port of directional control valve 6, can also realize exhaust by the mounting hole of pressure sensor 7, specific works principle is as follows:
To be vented by the mounting hole of pressure sensor 7, need first pressure sensor 7 to be twisted off, retraction hydraulic ram.When there is gas at cutoff port 4 place, the pressure of directional control valve 6 left and right sides all equals gaseous tension, the elastic force effect bottom spool of the controlling spring on the right side of directional control valve 6 is moved to the left, the mounting hole of gas from pressure sensor 7, in right side work, can be discharged when hydraulic ram is retracted by directional control valve 6.When gas drain, have pressure oil to flow through cutoff port 4 time, just have loss of pressure, directional control valve 6 left pressure is greater than right atrial pressure, spool is turned right movement, non-return valve operational, cuts off the oil circuit leading to pressure sensor 7, exhaust completes, and is twisted by pressure sensor 7.
Fender guard can also comprise protective case 5; Protective case 5 is located at the outside of hydraulic two-way lock 8, directional control valve 6 and pressure sensor 7.Protective case 5 offers through hole near the side of hydraulic ram.In protective case 5, the pipeline, electric wire etc. of all parts can via this by passing, to be connected with the equipment or device of outside.Arranging protective case 5 can protect hydraulic two-way lock 8, directional control valve 6 and pressure sensor 7 to damage from shock.
Protective case 5 can be the protective case 5 of metal material, and this material is comparatively hard, impact resistance or impact capacity stronger.
The fender guard that technique scheme provides, this fender guard is applicable to the Vertical Cylinders 1 of crane, when the pressure sensor 7 of Vertical Cylinders 1 be threaded be in loosen in long-term vibration process time, Lock pressure maintaining effect, thus ensure the safety that Vertical Cylinders 1 uses; The function of deflation hole is had when there being air to be mixed in hydraulic ram; and there is following technique effect: first; the safety of pressure acquisition can be increased, and owing to adopting directional control valve 6 pairs of pressure sensors 7 to protect, stopped owing to loosening the hidden danger brought.In addition, also degassing function is integrated with.Due to the application of directional control valve 6, except increasing safety, it also has the function of Quick air-discharge, achieves coupler lock oil cylinder and Quick air-discharge unification.Further, above-mentioned fender guard, all parts concentrates on one piece of installation, compact conformation.
The utility model embodiment also provides a kind of hoisting crane, comprises the fender guard that hydraulic ram and the arbitrary technical scheme of the utility model provide.
For ease of dismounting, change protective case 5, the protective case 5 of fender guard is connected with the cylinder bottom of hydraulic ram is detachable.
Above-mentioned arbitrary technical scheme disclosed in the utility model unless otherwise stated, if the number range of it discloses, so disclosed number range is preferred number range, anyly it should be appreciated by those skilled in the art: preferred number range is only the numerical value that in many enforceable numerical value, technique effect is obvious or representative.Because numerical value is more, cannot be exhaustive, so the utility model just discloses component values with casehistory the technical solution of the utility model, and the above-mentioned numerical value enumerated should not form restriction the utility model being created to protection domain.
If employ the word such as " first ", " second " herein to limit parts, those skilled in the art should know: the use of " first ", " second " is only used to be convenient to describe carry out difference as not having outside Stated otherwise to parts, the implication that above-mentioned word is not special.
Simultaneously, if above-mentioned the utility model discloses or relate to parts or the framing member of connection fastened to each other, so, unless otherwise stated, be fixedly connected with and can be understood as: can releasably be fixedly connected with (such as using bolt or screw to connect), also can be understood as: to be non-removablely fixedly connected with (such as rivet, weld), certainly, connection fastened to each other also can be replaced by integral type structure (such as use foundry technique is integrally formed create) (obviously cannot adopt except integrally formed technique).
In addition, apply in arbitrary technical scheme disclosed in above-mentioned the utility model for represent position relationship or shape term unless otherwise stated its implication comprise approximate with it, similar or close state or shape.Arbitrary parts that the utility model provides both can be assembled by multiple independent component part, and also can be one of the forming manufacture technics separate part out.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (10)
1. a fender guard, is characterized in that, comprises hydraulic two-way lock, directional control valve and pressure sensor;
First oil outlet of described hydraulic two-way lock is communicated with the rodless cavity of hydraulic ram, and the second oil outlet of described hydraulic two-way lock is communicated with the rod chamber of hydraulic ram;
First hydraulic fluid port of described directional control valve is communicated with the rodless cavity of described hydraulic ram, and the second hydraulic fluid port of described directional control valve is communicated with described pressure sensor;
Wherein, when described directional control valve and described pressure sensor are in the state of being tightly connected, the oil circuit between the first hydraulic fluid port of described directional control valve and the second hydraulic fluid port of described directional control valve is communicated with; When described directional control valve and described pressure sensor are in non-tight coupled condition, the oil circuit cut-off between the first hydraulic fluid port of described directional control valve and the second hydraulic fluid port of described directional control valve.
2. fender guard according to claim 1, is characterized in that, described directional control valve is two position two-way valve.
3. fender guard according to claim 2, is characterized in that, described directional control valve also has the first fluid control end, the second fluid control end and spring control end;
First hydraulic fluid port of described directional control valve is communicated with by throttling device with between the rodless cavity of described hydraulic ram, second hydraulic fluid port of described directional control valve is communicated with described pressure sensor, first fluid control end of described directional control valve is also communicated with the rodless cavity of described hydraulic ram, and the second fluid control end of described directional control valve is communicated with described pressure sensor; The spring control end of described directional control valve and the second fluid control end of described directional control valve are positioned at the homonymy of described directional control valve.
4. fender guard according to claim 3, is characterized in that, described throttling device comprises throttle pipe and is arranged on the cutoff port on described throttle pipe.
5. fender guard according to claim 3, is characterized in that, described throttling device comprises the first connection pipe, the second connection pipe and adaptor union, and described adaptor union is connected between described first connection pipe and described second connection pipe;
The flow area of described adaptor union is less than the flow area of described first connection pipe and described second connection pipe.
6. fender guard according to claim 1, is characterized in that, described fender guard also comprises protective case; Described protective case is located at the outside of described hydraulic two-way lock, described directional control valve and described pressure sensor;
The side of described protective case offers through hole.
7. fender guard according to claim 6, is characterized in that, described protective case is the protective case of metal material.
8. fender guard according to claim 1, is characterized in that, the second hydraulic fluid port of described directional control valve is connected with described pressure sensor is detachable and is communicated with.
9. a hoisting crane, is characterized in that, comprises hydraulic ram and the arbitrary described fender guard of claim 1-8.
10. hoisting crane according to claim 9, the protective case of described fender guard is connected with the cylinder bottom of described hydraulic ram is detachable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306779.5U CN204297964U (en) | 2014-06-10 | 2014-06-10 | Fender guard and hoisting crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306779.5U CN204297964U (en) | 2014-06-10 | 2014-06-10 | Fender guard and hoisting crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204297964U true CN204297964U (en) | 2015-04-29 |
Family
ID=53103524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420306779.5U Withdrawn - After Issue CN204297964U (en) | 2014-06-10 | 2014-06-10 | Fender guard and hoisting crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204297964U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003311A (en) * | 2014-06-10 | 2014-08-27 | 徐州重型机械有限公司 | Protective device and crane |
| CN108731872A (en) * | 2017-11-15 | 2018-11-02 | 江苏核电有限公司 | A kind of nuclear power plant containment shell seal tightness test device for pressure measurement |
-
2014
- 2014-06-10 CN CN201420306779.5U patent/CN204297964U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003311A (en) * | 2014-06-10 | 2014-08-27 | 徐州重型机械有限公司 | Protective device and crane |
| CN104003311B (en) * | 2014-06-10 | 2016-01-20 | 徐州重型机械有限公司 | Fender guard and hoisting crane |
| CN108731872A (en) * | 2017-11-15 | 2018-11-02 | 江苏核电有限公司 | A kind of nuclear power plant containment shell seal tightness test device for pressure measurement |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150429 Effective date of abandoning: 20160120 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150429 Effective date of abandoning: 20160120 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |