CN210290315U - Hydraulic control throttle valve for medical operating bed - Google Patents
Hydraulic control throttle valve for medical operating bed Download PDFInfo
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- CN210290315U CN210290315U CN201921082413.3U CN201921082413U CN210290315U CN 210290315 U CN210290315 U CN 210290315U CN 201921082413 U CN201921082413 U CN 201921082413U CN 210290315 U CN210290315 U CN 210290315U
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Abstract
The utility model relates to a liquid accuse choke valve for medical operation table, connect piston and compound plug screw through the right-hand member at the case, the piston passes through pressure regulating spring to be connected in the valve body, be equipped with damping screw in the compound plug screw, connect the piston through the damping hole in the damping screw, hydraulic pressure pipe when lift cylinder connects the electromagnetic directional valve breaks, or the hydraulic pressure pipe that electromagnetic directional valve was connected to first hydraulic fluid port breaks, because the pressure of second through-hole is zero or formation negative pressure in the twinkling of an eye in the compound plug screw, the piston moves to the right rapidly under pressure regulating spring's effort, the case moves to the right rapidly under the one-way spring effort, thereby the intercommunication of first hydraulic fluid port of quick closure and second hydraulic fluid port, keep the stability of the fluid in the lift cylinder, can effectively prevent the quick decline of lift cylinder.
Description
Technical Field
The utility model relates to a choke valve, in particular to a liquid accuse choke valve for medical operation table.
Background
At present, a one-way throttle valve is widely used for a device for controlling the ascending and descending of a bed of an operating table, as shown in fig. 1 and 2, and comprises a throttle screw 200, a motor-pump set 101, a valve body 1, a valve core 2, a pressure spring 300, a first oil port 10 connected with an electromagnetic directional valve 100, and a second oil port 20 connected with a lifting oil cylinder 102.
The motor pump set 101 provides high-pressure oil to enter the first oil port 10 through the electromagnetic directional valve 100, a part of the oil acts on an annular groove at the right end of the valve core 2, when the hydraulic pressure of the oil is greater than the spring force of the pressure spring 300, the valve core 2 moves leftwards, a channel is opened, the oil enters the lifting oil cylinder 102 through the second oil port 20, and the height of a bed is raised; after the operation is completed, the motor pump unit 101 provides high-pressure oil, the high-pressure oil enters the lifting oil cylinder 102 through the electromagnetic directional valve 100 and then enters the second oil port 20, the throttling screw 200 is adjusted anticlockwise to drive the valve core 2 to move leftwards, the oil is controlled to slowly flow into the first oil port 10 from the second oil port 20, the oil in the lifting oil cylinder 102 flows back to the motor pump unit 101 through the electromagnetic directional valve 100, and the height of the machine body is reduced.
However, when the hydraulic pipe 103 between the first oil port 10 of the one-way throttle valve and the electromagnetic directional valve 100 is accidentally broken, or the hydraulic pipe 103 between the cylinder of the lift cylinder 102 and the electromagnetic directional valve 100 is broken, the oil in the lift cylinder 102 is quickly drained, so that the bed position of the operating table is rapidly lowered, a great potential safety hazard is brought to patients and medical staff, and a major medical accident is particularly easily caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's defect, the utility model provides a liquid accuse choke valve for medical operation table, right-hand member through at the case sets up piston and compound plug screw, hydraulic pressure pipe that connects the electromagnetic directional valve at lift cylinder breaks or the hydraulic pressure pipe that the electromagnetic directional valve is connected to first hydraulic fluid port breaks the back, pressure in the second through-hole is zero or formation negative pressure in the twinkling of an eye in compound plug screw, the piston moves to the right under the pressure regulating spring effort, make the case move to the right under the one-way spring effort, thereby close the intercommunication of first hydraulic fluid port and second hydraulic fluid port, make the fluid in the lift cylinder keep unchangeable, the rapid decline of operation table has effectively been avoided.
The technical scheme for realizing the purpose is as follows:
the utility model provides a liquid accuse choke valve for medical operation table, including the valve body, be equipped with first hydraulic fluid port and second hydraulic fluid port on the valve body, first hydraulic fluid port passes through electromagnetic directional valve and connects motor pump package, and the second hydraulic fluid port connects lift cylinder, and lift cylinder passes through the hydraulic pressure pipe and flows to electromagnetic directional valve, and then flows back to motor pump package, first hydraulic fluid port connects the second hydraulic fluid port through the case in the valve body, the left end of valve body is equipped with first ladder hole, second ladder hole and third ladder hole from big to small according to the aperture in proper order, the case is located in the second ladder hole, the right-hand member of case be equipped with third ladder hole complex conical surface, conical surface with the second ladder hole forms the annular chamber, first hydraulic fluid port is equipped with the inclined hole of connecting the annular chamber;
the left end of the valve core is connected with a screw plug through a one-way spring, the screw plug is in threaded connection with the first ladder hole, a spring cavity is formed between the screw plug and the valve core, and a first through hole communicated with the second oil port is formed in the spring cavity;
a fourth ladder hole and a fifth ladder hole are sequentially formed in the right end of the valve body from large to small according to the aperture, the fifth ladder hole is communicated with the third ladder hole, a piston and a pressure regulating spring are arranged in the fifth ladder hole, the piston comprises a piston body at the end part and a piston rod at the tail part, the piston body is connected to the valve body through the pressure regulating spring, the piston rod is matched with the third ladder hole, and the tail end of the piston rod is connected with the valve core;
the hydraulic pipe is connected with the first ladder hole through a first through hole, the first ladder hole is connected with the second ladder hole through a second through hole, the second ladder hole is connected with the piston through a second screw plug, the first ladder hole is connected with the hydraulic pipe through a second screw plug, the second ladder hole is internally provided with a damping screw, and the damping screw is internally provided with a damping hole.
Further, the fifth ladder hole is a honing hole.
Furthermore, a first sealing ring is arranged at the joint of the screw plug and the first ladder hole.
Further, a second sealing ring is arranged at the joint of the composite plug screw and the fourth stepped hole.
Furthermore, a third sealing ring is arranged at the joint of the piston rod and the third ladder hole.
Has the advantages that: compared with the prior art, the utility model is different in that the utility model provides a hydraulic control throttle valve for a medical operating table, the right end of the valve core is connected with a piston and a composite plug screw, the piston is connected in the valve body through a pressure regulating spring, a damping screw is arranged in the composite plug screw, the piston is connected through a damping hole in the damping screw, when the hydraulic pipe of the lifting oil cylinder connected with the electromagnetic directional valve is broken or the hydraulic pipe of the first oil port connected with the electromagnetic directional valve is broken, because the pressure of the second through hole in the composite screw plug is zero or forms negative pressure instantly, the piston moves rightwards rapidly under the action of the pressure regulating spring, the valve core moves rightwards rapidly under the action of the one-way spring, therefore, the communication between the first oil port and the second oil port is quickly closed, the stability of oil in the lifting oil cylinder is kept, and the quick descending of the lifting oil cylinder is effectively prevented, so that the potential safety hazard of the bed body of the operating table caused by the lifting oil cylinder is greatly reduced; in addition, the hydraulic control throttle valve is sensitive in response, simple in structure, easy to process, low in cost and very wide in applicability.
Drawings
Fig. 1 is a front sectional view of a one-way throttle valve for a medical operating bed in the prior art.
Fig. 2 is a working principle diagram of a one-way throttle valve for a medical operating bed in the prior art.
Fig. 3 is a front sectional view of the hydraulic control throttle valve for medical operating table of the present invention.
Fig. 4 is a working principle diagram of the hydraulic control throttle valve for the medical operating bed of the present invention.
The hydraulic control valve comprises a valve body 1, a first oil port 10, a second oil port 20, a first ladder hole 11, a second ladder hole 12, a third ladder hole 13, a fourth ladder hole 14, a fifth ladder hole 15, a valve core 2, an annular cavity 21, an inclined hole 22, a one-way spring 3, a screw plug 4, a spring cavity 41, a first through hole 42, a piston 5, a piston body 51, a piston rod 52, a pressure regulating spring 6, a composite screw plug 7, a control oil cavity 71, a second through hole 72, a damping screw 8, a damping hole 81, an electromagnetic reversing valve 100, a motor pump group 101, a lifting oil cylinder 102, a hydraulic pipe 103, a throttling screw 200 and a pressure spring 300.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 3 and 4, the utility model provides a hydraulic control throttle valve for a medical operating table, which comprises a valve body 1, the valve body 1 is provided with a first oil port 10 and a second oil port 20, the first oil port 10 is connected with a motor pump set 101 through an electromagnetic directional valve 100, the second oil port 20 is connected with a lifting oil cylinder 102, the lifting oil cylinder 102 flows to the electromagnetic directional valve 100 through a hydraulic pipe 103, and then flows back to the motor-pump set 101, the first oil port 10 is connected with the second oil port 20 through the valve core 2 in the valve body 1, the left end of the valve body 1 is provided with a first ladder hole 11, a second ladder hole 12 and a third ladder hole 13 in turn according to the aperture from big to small, the valve core 2 is arranged in the second ladder hole 12, the right end of the valve core 2 is provided with a conical surface matched with the third ladder hole 13, the conical surface and the second ladder hole 12 form an annular cavity 21, and the first oil port 10 is provided with an inclined hole 22 connected with the annular cavity 21;
the left end of the valve core 2 is connected with a screw plug 4 through a one-way spring 3, the screw plug 4 is in threaded connection with the first stepped hole 11, a spring cavity 41 is formed between the screw plug 4 and the valve core 2, and a first through hole 42 communicated with the second oil port 20 is formed in the spring cavity 41;
a fourth stepped hole 14 and a fifth stepped hole 15 are sequentially formed in the right end of the valve body 1 from large to small according to the aperture, the fifth stepped hole 15 is communicated with the third stepped hole 13, a piston 5 and a pressure regulating spring 6 are arranged in the fifth stepped hole 15, the piston 5 comprises a piston body 51 at the end part and a piston rod 52 at the tail part, the piston body 51 is connected to the valve body 1 through the pressure regulating spring 6, the piston rod 52 is matched with the third stepped hole 13, and the tail end of the piston rod 52 is connected with the valve core 2;
the composite screw plug 7 is screwed in the fourth stepped hole 14, a second through hole 72 is formed in the composite screw plug 7, one end of the second through hole 72 is connected with the hydraulic pipe 104, the other end of the second through hole is connected with the piston 5, a control oil cavity 71 is formed between the composite screw plug 7 and the piston 5, a damping screw 8 is arranged in the second through hole 72, and a damping hole 81 is formed in the damping screw 8.
Preferably, the fifth stepped hole 15 is a honed hole.
Preferably, a first sealing ring is arranged at the joint of the screw plug 4 and the first ladder hole 11.
Preferably, a second sealing ring is arranged at the joint of the composite screw plug 7 and the fourth stepped hole 14.
Preferably, a third sealing ring is arranged at the joint of the piston rod 52 and the third stepped hole 13.
Particularly, the left end of the electromagnetic directional valve is electrified, the motor pump unit enables oil to flow into the first oil port through the electromagnetic directional valve, the oil flows into the annular cavity through the inclined hole, when the hydraulic pressure of the annular cavity is larger than the spring force of the one-way spring, the valve core moves leftwards, the first oil port is communicated with the second oil port, the oil enters the second oil port and flows into the lifting oil cylinder, the oil flows back to the motor pump unit through the hydraulic pipe and the electromagnetic directional valve, the second through hole is connected with the hydraulic pipe, and due to the fact that oil returns, the oil pressure in the control oil cavity is close to zero, the acting force of the control oil cavity acting on the piston is far. And the lifting oil cylinder starts to rise, when the lifting oil cylinder rises to a target position, the motor pump set stops working, and the electromagnetic directional valve is powered off.
The right end of the electromagnetic directional valve is electrified, the motor pump set enables oil to flow to the lifting oil cylinder and the second through hole through the electromagnetic directional valve and the hydraulic pipe, high-pressure oil enters the control oil cavity through the damping hole in the damping screw, oil pressure force overcomes acting force of the pressure regulating spring, the piston moves leftwards to jack the valve core, the valve core moves leftwards to overcome acting force of the one-way spring, a throttling opening between the first oil port and the second oil port is gradually opened, displacement of the valve core is in direct proportion to oil pressure force in the control oil cavity, the oil in the lifting oil cylinder gradually flows back to the motor pump set through the first oil port, and at the moment, the lifting oil.
When the lifting oil cylinder rises, if a hydraulic pipe of an oil cylinder piston rod cavity connected with the electromagnetic directional valve is broken, the pressure of oil in the oil cavity is controlled to be zero instantly, the piston moves rightwards rapidly under the action of a pressure regulating spring, the valve core moves rightwards rapidly under the action of a one-way spring, and the communication between the first oil port and the second oil port is closed, so that the oil in the lifting oil cylinder is stopped at the second oil port and is kept stable, and the rapid descending of the bed body of the operating table is avoided; if the hydraulic pipe of the first oil port connected with the electromagnetic directional valve is broken, the first oil port loses pressure instantly, the lifting oil cylinder moves downwards rapidly, the control oil cavity forms negative pressure, the oil pressure in the control oil cavity is smaller than the acting force of the pressure regulating spring, the piston moves rightwards, meanwhile, the second oil port is connected with the lifting oil cylinder, the lifting oil cylinder moves downwards, the pressure of oil in the second oil port is increased, the oil in the second oil port flows into the spring cavity through the first through hole, the valve core is forced to move rightwards under the combined action of the first oil port and the one-way spring, the communication between the first oil port and the second oil port is closed, the oil in the lifting oil cylinder is stopped at the second oil port, the stability is kept, and the rapid falling of.
Therefore, the hydraulic control throttle valve can effectively prevent the lifting oil cylinder from rapidly descending, and the potential safety hazard caused by the lifting oil cylinder on the bed body of the operating table is greatly reduced; meanwhile, the hydraulic control throttle valve is sensitive in response, simple in structure, easy to process, low in cost and very wide in applicability
It should be noted that the terms "first, second, third, fourth and fifth" in the present invention are used for descriptive purposes only, do not denote any order, are not to be construed as indicating or implying any relative importance, and are to be construed as names.
The above embodiments are merely preferred embodiments of the present disclosure, which are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present disclosure, should be included in the scope of the present disclosure.
Claims (5)
1. The utility model provides a hydraulically controlled choke valve for medical operation table, including the valve body, be equipped with first hydraulic fluid port and second hydraulic fluid port on the valve body, first hydraulic fluid port passes through electromagnetic directional valve and connects motor pump package, and lift cylinder is connected to the second hydraulic fluid port, and lift cylinder passes through hydraulic pressure pipe flow direction electromagnetic directional valve, and then flows back to motor pump package, first hydraulic fluid port connects second hydraulic fluid port, its characterized in that through the case in the valve body:
the left end of the valve body is sequentially provided with a first ladder hole, a second ladder hole and a third ladder hole from large to small according to the aperture, the valve core is arranged in the second ladder hole, the right end of the valve core is provided with a conical surface matched with the third ladder hole, the conical surface and the second ladder hole form an annular cavity, and the first oil port is provided with an inclined hole connected with the annular cavity;
the left end of the valve core is connected with a screw plug through a one-way spring, the screw plug is in threaded connection with the first ladder hole, a spring cavity is formed between the screw plug and the valve core, and a first through hole communicated with the second oil port is formed in the spring cavity;
a fourth ladder hole and a fifth ladder hole are sequentially formed in the right end of the valve body from large to small according to the aperture, the fifth ladder hole is communicated with the third ladder hole, a piston and a pressure regulating spring are arranged in the fifth ladder hole, the piston comprises a piston body at the end part and a piston rod at the tail part, the piston body is connected to the valve body through the pressure regulating spring, the piston rod is matched with the third ladder hole, and the tail end of the piston rod is connected with the valve core;
the hydraulic pipe is connected with the first ladder hole through a first through hole, the first ladder hole is connected with the second ladder hole through a second through hole, the second ladder hole is connected with the piston through a second screw plug, the first ladder hole is connected with the hydraulic pipe through a second screw plug, the second ladder hole is internally provided with a damping screw, and the damping screw is internally provided with a damping hole.
2. The fluid-operated throttle valve for medical operating tables according to claim 1, wherein:
and the fifth ladder hole is a honing hole.
3. The fluid-operated throttle valve for medical operating tables according to claim 1, wherein:
and a first sealing ring is arranged at the joint of the plug screw and the first ladder hole.
4. The fluid-operated throttle valve for medical operating tables according to claim 1, wherein:
and a second sealing ring is arranged at the joint of the composite plug screw and the fourth stepped hole.
5. The fluid-operated throttle valve for medical operating tables according to claim 1, wherein:
and a third sealing ring is arranged at the joint of the piston rod and the third ladder hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921082413.3U CN210290315U (en) | 2019-07-11 | 2019-07-11 | Hydraulic control throttle valve for medical operating bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921082413.3U CN210290315U (en) | 2019-07-11 | 2019-07-11 | Hydraulic control throttle valve for medical operating bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210290315U true CN210290315U (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921082413.3U Active CN210290315U (en) | 2019-07-11 | 2019-07-11 | Hydraulic control throttle valve for medical operating bed |
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| Country | Link |
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| CN (1) | CN210290315U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175458A (en) * | 2021-05-14 | 2021-07-27 | 中国船舶重工集团公司第七0七研究所九江分部 | Multistage damping low-noise reversing valve |
-
2019
- 2019-07-11 CN CN201921082413.3U patent/CN210290315U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175458A (en) * | 2021-05-14 | 2021-07-27 | 中国船舶重工集团公司第七0七研究所九江分部 | Multistage damping low-noise reversing valve |
| CN113175458B (en) * | 2021-05-14 | 2022-10-04 | 中国船舶重工集团公司第七0七研究所九江分部 | Multistage damping low-noise reversing valve |
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