CN208431219U - A kind of independent cooling thermostat valve of forklift hydraulic system - Google Patents
A kind of independent cooling thermostat valve of forklift hydraulic system Download PDFInfo
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- CN208431219U CN208431219U CN201820926995.8U CN201820926995U CN208431219U CN 208431219 U CN208431219 U CN 208431219U CN 201820926995 U CN201820926995 U CN 201820926995U CN 208431219 U CN208431219 U CN 208431219U
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Abstract
The utility model discloses a kind of forklift hydraulic systems independently to cool down thermostat valve, cylindric valve chamber is equipped in valve block, spool is equipped in valve chamber, finishing bathtray and lower oil groove are equipped with around valve chamber on the inner wall of valve chamber, the finishing bathtray is connected to the first oil outlet and oil return opening, lower oil groove is connected to the second oil outlet, the bottom of the valve chamber is equipped with oil inlet, the spool includes sliding the cylindrical hollow housing being adapted to valve chamber, wax formula temperature-sensing element is embedded in housing, the upper end of the temperature-sensing element is abutted with the cover board that valve chamber top is arranged in, the housing is by spring-loaded in the bottom of valve chamber, the outer peripheral surface of housing is equipped with the oil-through-hole through housing.The utility model can effectively control the temperature rise of truck hydraulic oil and hydraulic system, to effectively improve the service life of fork truck, have very high practical value.
Description
Technical field
The utility model relates to thermostat valve technical fields, and in particular to a kind of independent cooling thermostat valve of forklift hydraulic system.
Background technique
Fork truck, with the progress of work, inevitably makes hydraulic oil and entire hydraulic pressure system in course of normal operation
Temperature of uniting increases, little to the aging effects of the components such as Hydraulic Elements if temperature is in the normal range；If hydraulic oil temperature continues
It increases, then the thermal equilibrium temperature of entire hydraulic system can be made to increase, the reduction of oil temperature viscosity, leakage rate increase etc. is thus caused to be asked
Topic occurs, while further influencing the service life of Hydraulic Elements and entire fork truck.So the problem of truck hydraulic high oil temperature,
It must be effectively controlled and solve.In fork truck design process, generallys use and increase hydraulic oil container, improve body structure, increase
The volume of hydraulic oil filling case controls hydraulic oil temperature with the measure for increasing hydraulic oil cooling system, but by the limit of each system of fork truck
System, is difficult to accomplish again in terms of hydraulic oil container, body structure and hydraulic oil volume.In order to improve the radiating efficiency of hydraulic system,
Especially when the environment that fork truck uses is more severe, the temperature of forklift hydraulic system is with greater need for being effectively controlled.Publication date is
On July 29th, 2015, Publication No. CN 104813086A Chinese patent literature disclose a kind of thermostat valve, it is intended that realize structure
In addition simplification and miniaturization, the lightweight made can be improved smoothly action, and then improve persistence.The thermostat valve is in shell
Internal portion has the valve chamber for being connected to setting with first flow path via opening.Second, third flow path is equipped in the valve chamber inner opening.Separately
Outside, it is equipped with thermocouple in the valve chamber, can configure to moving back and forth in the axial direction, and and following fluid temperature (F.T.)
Movement, to will be connected to, block between second, third flow path；Helical spring blocks direction to exert a force thermocouple to flow path.?
The opening of first flow path and the third fluid communication being connected to valve chamber is provided as the open communication, is blocked and in connection
Helical spring is also used as the bullet for blocking direction to exert a force to its flow path by the valve body for making the by-passing valve being connected between first, third flow path
Spring device.But the thermostat valve controls the size that flow path is open as temperature control element, and by other action components using thermocouple
Realize flow control, control structure is complicated, temperature change that is at high cost and cannot timely responding to flow path.
Utility model content
The purpose of this utility model be for solve the prior art the problems of, it is only to provide a kind of forklift hydraulic system
It is vertical to cool down thermostat valve, the temperature rise of truck hydraulic oil and hydraulic system can be effectively controlled, to effectively improve the use longevity of fork truck
Life.
The utility model technical solution used for the above purpose is that a kind of forklift hydraulic system is independently cooling warm
Valve is controlled, the temperature for forklift hydraulic system hydraulic oil controls, the valve block including cuboid, is equipped with cylindric valve in the valve block
Chamber, valve chamber is interior to be equipped with spool, surround valve chamber on the inner wall of valve chamber and is equipped with finishing bathtray and lower oil groove, the finishing bathtray goes out with first
Hydraulic fluid port and oil return opening connection, lower oil groove are connected to the second oil outlet, and the bottom of the valve chamber is equipped with oil inlet, and the spool includes
Slide the cylindrical hollow housing that be adapted to valve chamber, be embedded with wax formula temperature-sensing element in housing, the upper end of the temperature-sensing element and
The cover board that valve chamber top is arranged in abuts, and by spring-loaded in the bottom of valve chamber, the outer peripheral surface of housing is equipped with to be passed through the housing
The oil-through-hole for wearing housing, when the temperature of forklift hydraulic system hydraulic oil be lower than temperature-sensing element action value when, the oil-through-hole with
Finishing bathtray connection；When the temperature of hydraulic oil increases, housing moves down under the action of temperature-sensing element, and the oil-through-hole moves down
And it is connected to lower oil groove.The thermostat valve of the utility model is by valve block, a spool comprising wax formula temperature-sensing element, cover board and is used for
The composition such as spring of valve core reset.One cylindricality valve chamber is set in the valve block of thermostat valve, and the housing and cylindricality valve chamber of spool are suitable
Match and can be slided up and down in valve chamber, valve chamber is connected to the hydraulic oil main oil gallery as thermostat valve, the cover of hollow structure with oil inlet
Shell can be such that temperature-sensing element is immersed in hydraulic oil, upper and lower two oil grooves are equipped in valve chamber, wherein finishing bathtray and the first oil outlet
(room temperature oil outlet) connection, lower oil groove are connected to the second oil outlet (high temperature oil outlet)；Thermostat valve is serially connected in liquid in actual use
In pressure oil road, when hydraulic fluid temperature is not high to be cooled down, the temperature-sensing element in spool is failure to actuate, work of the housing in spring force
It is located at valve chamber top with lower, the oil-through-hole on housing is connected to finishing bathtray, and the hydraulic oil for entering housing from valve chamber bottom passes through logical
Oilhole and finishing bathtray be normally flowed into hydraulic oil container from the outflow of the first oil outlet (oil groove under housing closed front at this time, with
The oil return opening of external heat sink connection is obstructed), complete a cyclic process.When hydraulic fluid temperature raising needs cooling, spool
Interior temperature-sensing element expanded by heating, due to temperature-sensing element upper end abutting cover board and cover board is fixed, temperature-sensing element expanded by heating
Housing is pushed to overcome spring force mobile to valve chamber bottom, the oil-through-hole on housing moves downward away from finishing bathtray with housing, leads to
Oilhole is gradually staggered with finishing bathtray and is connected to lower oil groove, final housing closed front finishing bathtray, hydraulic oil by oil-through-hole and
Lower oil groove is flowed out from the second oil outlet, and hydraulic oil (cooperates the temperature sensor of electrical aspect to control cooling through external heat sink
Fan is powered, so that cooling fan is powered, rotation blowing is cooling to oil liquid) it is cooling after pass through oil return opening and the first oil outlet stream again
Enter into hydraulic oil container, thus completes a complete cooling cycle process.And after the reduction of the temperature of hydraulic oil, temperature-sensing element
Cooling meat, housing reset under the elastic force effect of spring to valve chamber top is mobile, and the above process can be with hydraulic fluid temperature
The progress for changing and moving in circles.In this way, the utility model utilizes the warming characteristic of spool and the structure of ingenious combination valve block, control
The trend of hydraulic oil processed realizes the adjusting to hydraulic oil liquid temperature, effectively controls the temperature rise of truck hydraulic oil and hydraulic system,
To effectively improve the service life of fork truck.This valve block cooperation electric controling part etc. is used together, and hydraulic oil liquid temperature is made to exist
When thermostat valve starts to act or reach the setting value of electric sensor, hydraulic oil cooling fan is powered to intervening and use, on the one hand right
The temperature of control oil liquid and hydraulic system has significant effect, the intervention of another aspect cooling fan intelligence, so that cooling body
It is more energy saving.
Preferably, being equipped with groove in the valve block on the valve chamber top, the cross-sectional area of groove is greater than the transversal of valve chamber
Area, in groove, the inner wall at slot opening is equipped with card slot for the cover board setting, is equipped with described in being used to fix in card slot
The circlip of cover board is equipped with sealing ring between cover board and valve chamber inner wall.For placing cover board, the card slot on groove inner wall is used for groove
The circlip of fixed cover board is set, and sealing ring prevents hydraulic fluid leak for sealing valve chamber.
Preferably, the barrel upper end fold inward of the housing and being downwardly extending cavity, cavity bottom is formed with
Baffle ring, the temperature-sensing element are embedded in baffle ring, and the upper end of the spring is abutted with baffle ring.Cavity and the baffle ring of bottom are used for
Fixed temperature-sensing element；The upper end of spring is abutted with baffle ring, and lower end is abutted with valve chamber bottom, for resetting housing upwards.
Preferably, the temperature-sensing element includes temperature sensing package and the push rod for stretching out temperature sensing package, the push rod is abutted with cover board,
The temperature sensing package is embedded in baffle ring, and the circular conical surface being adapted to temperature sensing package is formed on the baffle ring.Circular conical surface on baffle ring can
To be further close to temperature sensing package, it is ensured that temperature sensing package does not glance off when thermostat valve works.
Preferably, the width of the finishing bathtray and lower oil groove is of same size, the oil-through-hole is circumferentially to set along housing
The strip hole set, the width of oil-through-hole are less than the width of finishing bathtray or lower oil groove.It can be very along the strip hole that housing is circumferentially arranged
Good matches with finishing bathtray or lower oil groove, and the flow and switching for meeting hydraulic oil require.
Preferably, valve chamber height (the i.e. upper edge of the lower edge of finishing bathtray and lower oil groove between upper and lower oil groove
The distance between) it is less than the width of oil-through-hole.Valve chamber height between upper and lower oil groove is less than the width of oil-through-hole, works as hydraulic oil
During temperature raising housing moves down, it can be connected to simultaneously with upper and lower oil groove in a certain position oil-through-hole (i.e. a part of
Hydraulic oil is flowed out by finishing bathtray, and another part hydraulic oil is flowed out by lower oil groove), it may insure liquid when thermostat valve work in this way
Pressure oil passage is switched to lower oil groove from finishing bathtray incessantly, and hydraulic oil is avoided to interrupt.
Preferably, oil inlet and valve chamber are on the same line, the center line of oil return opening and the center line of valve chamber mutually hang down
It is straight and in the same plane, the first oil outlet it is vertical with oil return opening and with the second oil outlet on the same side of valve block, with
Oil return opening and the opposite valve block side of the second oil outlet are equipped with fixing threaded hole.
The utility model has the beneficial effects that it efficiently solves the fork truck of the prior art in hydraulic oil when oil temperature is higher
The problem of being easy to appear hydraulic fluid leak, further influencing Hydraulic Elements and entire fork truck service life, the temperature of the utility model
Valve is controlled using the warming characteristic of spool and the structure of ingenious combination valve block, the trend of hydraulic oil is controlled, realizes to hydraulic oil liquid
The adjusting of temperature, the temperature rise that can effectively control truck hydraulic oil and hydraulic system have to improve the service life of fork truck
Very high practical value.
Detailed description of the invention
Fig. 1 is a kind of structure sectional view that the utility model forklift hydraulic system independently cools down thermostat valve；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is a kind of structure sectional view of the utility model thermostatic valve core；
Fig. 4 is a kind of structure sectional view of the utility model thermostat valve valve block；
Fig. 5 is a kind of structure sectional view of the utility model thermostat valve temperature sensing package unswollen state；
Fig. 6 is a kind of structure sectional view of the utility model thermostat valve temperature sensing package swelling state；
Fig. 7 is a kind of schematic perspective view of the utility model thermostat valve valve block；
Fig. 8 is another schematic perspective view of the utility model thermostat valve valve block.
In figure: 1. valve blocks, 2. valve chambers, 3. spools, 4. finishing bathtray, 5. lower oil grooves, 6. first oil outlets, 7. oil return openings, 8.
Second oil outlet, 9. oil inlets, 10. housings, 11. temperature-sensing elements, 12. cover boards, 13. springs, 14. oil-through-holes, 15. grooves,
16. card slot, 17. circlips, 18. sealing rings, 19. cavitys, 20. baffle rings, 21. temperature sensing packages, 22. push rods, 23. fixing threaded holes.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing being more specifically described to the technical solution of the utility model.
Embodiment 1
In such as Fig. 1 embodiment 1 shown in Fig. 2, a kind of independent cooling thermostat valve of forklift hydraulic system is used for truck hydraulic
The temperature of system hydraulic oil controls, and the valve block 1(including cuboid is shown in Fig. 3), the valve block is interior to be equipped with cylindric valve chamber 2, valve chamber
The interior spool 3(that is equipped with is shown in Fig. 4), finishing bathtray 4 and lower oil groove 5 are equipped with around valve chamber on the inner wall of valve chamber, and the width of finishing bathtray is under
Oil groove it is of same size, the finishing bathtray is connected to the first oil outlet 6 and oil return opening 7, and lower oil groove and the second oil outlet 8 connect
Logical, the bottom of the valve chamber is equipped with oil inlet 9, and the spool includes sliding the cylindrical hollow housing 10 being adapted to, cover with valve chamber
The outer peripheral surface of shell is equipped with the oil-through-hole 14 through housing, the oil-through-hole be along the strip hole that housing is circumferentially arranged, oil-through-hole
Width is less than the width of finishing bathtray or lower oil groove；Valve chamber height (the i.e. lower edge of finishing bathtray and lower oil between upper and lower oil groove
The distance between upper edge of slot) it is less than the width of oil-through-hole.When the temperature of forklift hydraulic system hydraulic oil is lower than temperature-sensitive member
When the action value of part, the oil-through-hole is connected to finishing bathtray；When the temperature of hydraulic oil increases, effect of the housing in temperature-sensing element
Under move down, the oil-through-hole is moved down and is connected to lower oil groove.
The barrel upper end fold inward of housing is simultaneously downwardly extending cavity 19, and cavity bottom is formed with baffle ring 20,
Wax formula temperature-sensing element 11 is embedded in baffle ring, the temperature-sensing element includes the push rod 22 of temperature sensing package 21 and stretching temperature sensing package, described
Push rod is abutted with the cover board 12 that valve chamber top is arranged in, and the temperature sensing package is embedded in baffle ring, is formed on baffle ring and temperature sensing package
The circular conical surface of adaptation；13 the upper end of spring for valve core reset is abutted with baffle ring, and the lower end of spring is supported on the bottom of valve chamber.
It is equipped with groove 15 in the valve block on the valve chamber top, the cross-sectional area of groove is greater than the cross-sectional area of valve chamber, the cover board
It is arranged in groove, the inner wall at slot opening is equipped with card slot 16, the circlip 17 for fixing the cover board is equipped in card slot,
Sealing ring 18 is equipped between cover board and valve chamber inner wall.
On the same line, the center line of oil return opening and the center line of valve chamber are mutually perpendicular to and are located at same for oil inlet and valve chamber
In one plane, the first oil outlet it is vertical with oil return opening and with the second oil outlet on the same side of valve block (see figure 7), with oil return
Mouthful and the opposite valve block side of the second oil outlet on set see Fig. 8 there are four fixing threaded hole 23().
When the forklift hydraulic system of the utility model independently cools down thermostat valve work, oil inlet connection hydraulic circuit, first
Oil outlet connects hydraulic oil container, and the second oil outlet connects oil return opening, oil inlet of the hydraulic oil from valve chamber bottom by external radiator
Mouth enters valve chamber, and when hydraulic fluid temperature is lower than the action value of temperature-sensing element, the temperature-sensing element in spool is failure to actuate, and housing is in bullet
It is located at valve chamber top (see figure 5) under the action of spring force, the oil-through-hole on housing is connected to finishing bathtray, enters cover from valve chamber bottom
The hydraulic oil of shell is normally flowed into hydraulic oil container (at this time outside housing by oil-through-hole and finishing bathtray with from the outflow of the first oil outlet
Wall closes lower oil groove, and the oil return opening connecting with external heat sink is obstructed), complete one cycle process.When hydraulic fluid temperature increases
When, the temperature-sensing element expanded by heating in spool, since temperature-sensing element upper end abuts cover board and cover board is fixed, temperature-sensing element by
Thermal expansion pushes housing to overcome spring force mobile to valve chamber bottom, and the oil-through-hole on housing is moved downward away from housing to oil
Slot, oil-through-hole are gradually staggered with finishing bathtray and are connected to lower oil groove, and a part of hydraulic oil is flowed out by finishing bathtray at this time, another portion
Liquid separation pressure oil is flowed out by lower oil groove, i.e., cools down to section hydraulic oil；When hydraulic fluid temperature continues to increase, final housing
Closed front finishing bathtray (see figure 6), hydraulic oil all passes through oil-through-hole and lower oil groove is flowed out from the second oil outlet, and hydraulic oil is through outer
It is flowed into hydraulic oil container by oil return opening and the first oil outlet again after portion's radiator is cooling, thus completes a complete cooling
Cyclic process.And after the reduction of the temperature of hydraulic oil, temperature-sensing element cooling meat, housing is under the elastic force effect of spring to valve chamber
Top is mobile to be resetted, the progress that above-mentioned temperature adjustment process can move in circles with the variation of hydraulic fluid temperature.
In addition to the implementation, in the range disclosed in claims of the utility model and specification, this is practical
Novel technical characteristic or technical data can be reselected and be combined, to constitute new embodiment, these are all these
Field technical staff is without carrying out what creative work can be realized, therefore the implementation that these the utility model are not described in
Mode also should be regarded as specific embodiment of the utility model and be within the protection scope of the utility model.
Claims (8)
1. independently cooling thermostat valve, the temperature for forklift hydraulic system hydraulic oil control a kind of forklift hydraulic system, feature
Be the valve block (1) including cuboid, be equipped with cylindric valve chamber (2) in the valve block, be equipped with spool (3) in valve chamber, valve chamber it is interior
It is equipped with finishing bathtray (4) and lower oil groove (5) around valve chamber on wall, the finishing bathtray and the first oil outlet (6) and oil return opening (7) are even
Logical, lower oil groove is connected to the second oil outlet (8), and the bottom of the valve chamber is equipped with oil inlet (9), and the spool includes sliding with valve chamber
The cylindrical hollow housing (10) of dynamic adaptation, is embedded with wax formula temperature-sensing element (11) in housing, the upper end of the temperature-sensing element with
The cover board (12) that valve chamber top is arranged in abuts, and the housing is supported on the bottom of valve chamber, the periphery of housing by spring (13)
Face is equipped with the oil-through-hole (14) through housing, when the temperature of forklift hydraulic system hydraulic oil is lower than the action value of temperature-sensing element,
The oil-through-hole is connected to finishing bathtray；When the temperature of hydraulic oil increases, housing moves down under the action of temperature-sensing element, institute
Oil-through-hole is stated to move down and be connected to lower oil groove.
2. forklift hydraulic system according to claim 1 independently cools down thermostat valve, characterized in that the valve on the valve chamber top
Groove (15) are equipped on block, the cross-sectional area of groove is greater than the cross-sectional area of valve chamber, and the cover board is arranged in groove, recessed
Inner wall at channel opening is equipped with card slot (16), and the circlip (17) for fixing the cover board, cover board and valve chamber are equipped in card slot
Sealing ring (18) are equipped between inner wall.
3. the forklift hydraulic system independently cools down thermostat valve according to claim 1, characterized in that the barrel of the housing
Upper end fold inward is simultaneously downwardly extending cavity (19), and cavity bottom is formed with baffle ring (20), and the temperature-sensing element is embedded
In baffle ring, the upper end of the spring is abutted with baffle ring.
4. the independent cooling thermostat valve of forklift hydraulic system according to claim 3, characterized in that the temperature-sensing element includes
Temperature sensing package (21) and the push rod (22) for stretching out temperature sensing package, the push rod are abutted with cover board, and the temperature sensing package is embedded in baffle ring.
5. forklift hydraulic system according to claim 4 independently cools down thermostat valve, characterized in that be formed on the baffle ring
The circular conical surface being adapted to temperature sensing package.
6. the forklift hydraulic system independently cools down thermostat valve according to claim 1, characterized in that the width of the finishing bathtray
Degree is of same size with lower oil groove, and the oil-through-hole is that the width of oil-through-hole, which is less than, to oil along the strip hole that housing is circumferentially arranged
The width of slot or lower oil groove.
7. the forklift hydraulic system according to claim 6 independently cools down thermostat valve, characterized in that between upper and lower oil groove
Valve chamber height is less than the width of oil-through-hole.
8. forklift hydraulic system according to claim 1 independently cools down thermostat valve, characterized in that the oil inlet and valve chamber
On the same line, the center line of oil return opening and the center line of valve chamber are mutually perpendicular to and in the same plane, the first oil outlet
It is vertical with oil return opening and with the second oil outlet on the same side of valve block, the valve block side opposite with oil return opening and the second oil outlet
Face is equipped with fixing threaded hole (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820926995.8U CN208431219U (en) | 2018-06-14 | 2018-06-14 | A kind of independent cooling thermostat valve of forklift hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820926995.8U CN208431219U (en) | 2018-06-14 | 2018-06-14 | A kind of independent cooling thermostat valve of forklift hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN208431219U true CN208431219U (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820926995.8U Active CN208431219U (en) | 2018-06-14 | 2018-06-14 | A kind of independent cooling thermostat valve of forklift hydraulic system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843818A (en) * | 2018-06-14 | 2018-11-20 | 杭叉集团股份有限公司 | Forklift hydraulic system independently cools down thermostat valve |
| CN113063023A (en) * | 2020-08-12 | 2021-07-02 | 深圳市亨瑞达制冷设备有限公司 | Water-cooled type water chiller equipment without squeaking |
| CN113551060A (en) * | 2021-07-02 | 2021-10-26 | 中国船舶重工集团公司第七二四研究所 | Constant temperature difference flow matching control device based on temperature sensitive device |
-
2018
- 2018-06-14 CN CN201820926995.8U patent/CN208431219U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843818A (en) * | 2018-06-14 | 2018-11-20 | 杭叉集团股份有限公司 | Forklift hydraulic system independently cools down thermostat valve |
| CN113063023A (en) * | 2020-08-12 | 2021-07-02 | 深圳市亨瑞达制冷设备有限公司 | Water-cooled type water chiller equipment without squeaking |
| CN113063023B (en) * | 2020-08-12 | 2022-06-28 | 深圳市亨瑞达制冷设备有限公司 | Water-cooled type water chiller equipment without squeaking |
| CN113551060A (en) * | 2021-07-02 | 2021-10-26 | 中国船舶重工集团公司第七二四研究所 | Constant temperature difference flow matching control device based on temperature sensitive device |
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