CN210218786U - Change-over valve structure that can switch between cross and tee bend - Google Patents
Change-over valve structure that can switch between cross and tee bend Download PDFInfo
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- CN210218786U CN210218786U CN201921138258.2U CN201921138258U CN210218786U CN 210218786 U CN210218786 U CN 210218786U CN 201921138258 U CN201921138258 U CN 201921138258U CN 210218786 U CN210218786 U CN 210218786U
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Abstract
A switching valve structure capable of switching between a four-way valve and a three-way valve comprises a cylinder body, a slide valve arranged in the cylinder body and a control part for driving the slide valve to move left and right; the slide valve comprises a valve core and a connecting piece for connecting the valve core and the control part; the valve core has sealing capacity and can isolate fluid at the left end and the right end of the valve core, and the valve core is arranged on the connecting piece and is controlled to move left and right through the control part; the switching valve has three states according to the position of the spool, including: a four-way state, a right three-way state and a left three-way state; the utility model discloses an effective feasible conversion valve structure realizes flow path cross and three-way conversion demand, can simplify pipeline and control simultaneously, and reduce cost improves system reliability.
Description
Technical Field
The utility model relates to a change-over control valve, concretely relates to change-over valve structure that can switch between cross and tee bend.
Background
The single-stage refrigeration or heat pump equipment system is simple and efficient in operation, but with the development of technology and social progress, application scenes are gradually complicated, and equipment functions are gradually diversified, so that related branches and control valves (valve banks) are additionally designed in the existing system to control the switching of the system so as to convert the operation condition of the system, and scene matching or function conversion is realized.
The most commonly used composite control valve part of the existing refrigeration/heat pump system is a four-way reversing valve which can realize the switching from two-to-two communication to two-to-two communication of another combination on four passages (i.e. ab and cd connection is switched to ac and bd connection), thereby realizing the reversing countercurrent operation of the system and further realizing the function switching of the refrigeration/heat pump of the air conditioning system.
However, in a compressor or a refrigeration apparatus, there is a need for a switching valve capable of switching between four-way/three-way. After the system is converted into a three-way state, under the condition of shielding a certain branch, the system can also be communicated with other branches so as to maximally utilize spare flow passages or spare functional parts, thereby reducing the system loss and improving the efficiency. Under the condition, the switching requirement of the system is realized by different switching schemes by only adopting a switching valve group consisting of three electromagnetic valves. Therefore, the system has high control time accuracy requirement on each valve, the control is complex, system parts and cost are increased, the uncertainty of the system is improved, and the reliability is reduced.
Disclosure of Invention
In order to overcome the problem, the utility model provides a change-over valve structure that can switch between cross and tee bend effectively realizes system cross and three-way flow path conversion demand, can simplify pipeline and control simultaneously, reduce cost improves system reliability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a switching valve structure capable of switching between a four-way valve and a three-way valve comprises a cylinder body 10, a slide valve 30 arranged in the cylinder body 10 and a control assembly 20 for controlling the slide valve 30 to move left and right or stop; the spool valve 30 includes a spool 31 and a connection member connecting the spool 31 and a control part;
the valve core 31 has sealing capability after being installed, and can isolate the fluid inside the slide valve 30 and at the left end and the right end of the valve core 31 to prevent mutual leakage;
the cylinder 10 is provided with four fluid channels, namely a left inner channel 11 and a right inner channel 12 which are two inner channels, namely a left outer channel 13 and a right outer channel 14, and the minimum distance between the left inner channel 11 and the right inner channel 12 is larger than or equal to the thickness of the valve core 31; the minimum distance between the left outer channel 13 and the left inner channel 11 and the minimum distance between the right outer channel 14 and the right inner channel 12 are greater than or equal to 0;
the switching valve has three states according to the position of the valve core 31, which are respectively: the valve core 31 is positioned between the left inner side channel 11 and the right inner side channel 12 and is in a four-way state; the valve core 31 is positioned between the left inner side channel 11 and the left outer side channel 13 and is in a right three-way state; the valve core 31 is positioned between the right inner side channel 12 and the right outer side channel 14, and is in a left three-way state.
The control part 20 comprises a driving part 21 for controlling the left and right movement of the slide valve 30 and a stopping part 22 for controlling the stop of the slide valve 30; when the driving part 21 is a stepping motor, the slide valve 30 includes a valve core 31 capable of moving left and right, and a screw 32 for connecting the valve core 31 and the stepping motor and controlling the valve core 31 to move, and the screw 32 is controlled to rotate in different directions by the transmission of the stepping motor; the valve core 31 is installed on the screw rod 32, and the screw rod 32 rotates to control the valve core 31 to move left and right.
When the stopping component 22 of the control component is a gear stopping component, the stopping component 22 comprises a gear and a limit pin, and the rotation of the screw 32 is limited by the interference of the limit pin on the rotation of the gear, so as to prevent the valve core 31 from freely sliding in the stop state of the stepping motor or sliding due to the pressure difference between the two ends.
When the stopper member 22 of the control member is a friction stopper, the stopper member 22 includes a friction block and a friction wheel having a large friction force, and the rotation of the screw 32 is restricted by a friction action between the friction block and the friction wheel, so that the valve body 31 is prevented from freely sliding in a stop state of the stepping motor or from sliding due to a pressure difference between both ends.
When the control component 20 is a differential pressure transmission pressure chamber, the slide valve 30 includes a valve core 31 capable of moving left and right and a connecting rod 35 connected to two ends of the valve core 31, the differential pressure transmission pressure chamber includes a left pressure chamber 33 and a right pressure chamber 34 located at two ends of the valve core 31 in the cylinder 10, and the outer end of the connecting rod 35 is connected to a slide gate of the left pressure chamber 33 and the right pressure chamber 34; the left and right movement of the valve body 31 is controlled by communicating different fluid pressures to the left and right pressure chambers 33 and 34, respectively. The structure has no stop component, and the stop of the valve core is controlled by the left pressure chamber and the right pressure chamber.
The left and right inner passages 11, 12 are outlets of the switching valves, and the left and right outer passages 13, 14 are inlets of the switching valves.
Compared with the prior art, the utility model discloses possess following advantage:
1. the utility model provides a change-over valve effectively realizes the flow path switching requirement of system cross and tee bend, has simplified system control valves and control strategy.
2. The utility model provides a change-over valve can effectively reduce system control component, simplifies the pipeline, and reduction in production cost has high reliability simultaneously.
3. The utility model provides a change-over valve, simple structure, easily production and processing has abundant market competition.
Drawings
Fig. 1 is a cross-sectional view of the change-over valve controlled by a motor according to the present invention.
Fig. 2 is a schematic diagram showing the state of the right tee joint of the conversion valve of the present invention.
Fig. 3 is a schematic diagram of the state of the left tee joint of the conversion valve of the present invention.
Fig. 4 is a schematic structural diagram of the change-over valve adopting differential pressure transmission according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a cross-sectional view of a change-over valve according to the present invention, which can be switched between a four-way valve and a three-way valve.
The switching valve includes a cylinder 10, a spool 30 disposed in the cylinder 10, and a control assembly 20 controlling the spool 30 to move left and right or stop. The control part 20 comprises a driving part 21 for controlling the left and right movement of the slide valve 30 and a stopping part 22 for controlling the stop of the slide valve 30;
the driving part 21 is a stepping motor, and the slide valve 30 includes a spool 31 movable left and right, and a screw 32 controlling the movement of the spool 31. The screw 32 is driven by a stepping motor to rotate in different directions. The valve core 31 is installed on the screw rod 32, and the screw rod 32 rotates to control the valve core 31 to move left and right. The valve core 31 has sealing capability after being installed, and can isolate the fluid inside the slide valve 30 and at the left end and the right end of the valve core 31 to prevent mutual leakage.
The cylinder 10 is provided with four fluid channels which are two inner channels, namely a left inner channel 11 and a right inner channel 12, and two outer channels, namely a left outer channel 13 and a right outer channel 14, wherein the minimum distance between the left inner channel 11 and the right inner channel 12 is greater than or equal to the thickness of the valve core 31, namely L1 is greater than or equal to H; the minimum distance between the left outer channel 13 and the left inner channel 11 and the minimum distance between the right outer channel 14 and the right inner channel 12 are greater than or equal to 0, that is, L2 is greater than or equal to 0, and L3 is greater than or equal to 0.
The stopping member 22 of the control member may be a gear stopping member, in which case the stopping member 22 includes a gear and a limit pin, and the rotation of the screw 32 is limited by the interference of the limit pin with the rotation of the gear, so as to prevent the valve core 31 from freely sliding in the stop state of the stepping motor or from sliding due to the pressure difference between the two ends.
The stop member 22 of the control member may be a friction stop, in which case the stop member 22 includes a friction block and a friction wheel having a large friction force, and the rotation of the screw 32 is limited by the friction between the friction block and the friction wheel, so as to prevent the valve core 31 from freely sliding in a stop state of the stepping motor or from sliding due to a pressure difference between both ends.
The switching valve has three states according to the position of the spool 31, including:
the valve core 31 is positioned between the left inner side channel 11 and the right inner side channel 12, and is in a four-way state, as shown in fig. 1;
the valve core 31 is positioned between the left inner channel 11 and the left outer channel 13, and is in a right three-way state, as shown in fig. 2;
the valve core 31 is located between the right inner channel 12 and the right outer channel 14, and is in a left three-way state, as shown in fig. 3.
Fig. 4 is a cross-sectional view of a change-over valve according to the present invention, which can be switched between a four-way valve and a three-way valve.
The valve core 31 can adopt differential pressure transmission to replace a stepping motor and screw transmission, and the same function of a conversion valve is realized. When the control component is a differential pressure transmission pressure chamber, the slide valve 30 comprises a valve core 31 capable of moving left and right and a connecting rod 35 connected to two ends of the valve core 31, the differential pressure transmission pressure chamber comprises a left pressure chamber 33 and a right pressure chamber 34 located at two ends of the valve core 31 in the cylinder 10, and the outer end of the connecting rod 35 is connected with a slide door of the left pressure chamber 33 and the right pressure chamber 34; the left pressure chamber 33 and the right pressure chamber 34 are respectively communicated with different fluid pressures to control the left and right movement of the valve core 31, so as to achieve different states of the switching valve. That is, when the pressure of the left pressure chamber 33 is greater than that of the right pressure chamber 34, the spool 31 moves rightward; when the left pressure chamber 33 is less than the right pressure chamber 34, the spool 31 moves leftward; when the two pressure chambers are equal in pressure, the spool 31 stops moving.
In the embodiment of the present invention, the relative position descriptions of the left, right, inner and outer sides are not further technical limitations of the technical solution of the present invention; in fact, all the related structures according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A switching valve structure capable of switching between a four-way valve and a three-way valve comprises a cylinder body (10), a slide valve (30) arranged in the cylinder body (10) and a control component (20) for controlling the slide valve (30) to move left and right or stop; the slide valve (30) comprises a valve core (31) and a connecting piece for connecting the valve core (31) and the control part;
the valve core (31) has sealing capability after being installed, and can isolate the fluid inside the sliding valve (30) and at the left end and the right end of the valve core (31) to prevent mutual leakage;
the cylinder (10) is provided with four fluid channels which are two inner side channels, namely a left inner side channel (11) and a right inner side channel (12), and two outer side channels, namely a left outer side channel (13) and a right outer side channel (14), wherein the minimum distance between the left inner side channel (11) and the right inner side channel (12) is more than or equal to the thickness of the valve core (31); the minimum distance between the left outer channel (13) and the left inner channel (11) and the minimum distance between the right outer channel (14) and the right inner channel (12) are more than or equal to 0;
the switching valve has three states according to different positions of the valve core (31), and the states are respectively as follows: the valve core (31) is positioned between the left inner side channel (11) and the right inner side channel (12) and is in a four-way state; the valve core (31) is positioned between the left inner side channel (11) and the left outer side channel (13) and is in a right three-way state; the valve core (31) is positioned between the right inner side channel (12) and the right outer side channel (14) and is in a left three-way state.
2. A diverter valve structure switchable between a four-way and a three-way valve according to claim 1, wherein: the control part (20) comprises a driving part (21) for controlling the slide valve (30) to move left and right and a stopping part (22) for controlling the slide valve (30) to stop; when the driving part (21) is a stepping motor, the slide valve (30) comprises a valve core (31) capable of moving left and right and a screw rod (32) for controlling the valve core (31) to move and connecting the valve core (31) with the stepping motor, and the screw rod (32) is controlled to rotate in different directions through the transmission of the stepping motor; the valve core (31) is arranged on the screw rod (32) and is rotated through the screw rod (32) to control the valve core (31) to move left and right.
3. A diverter valve structure switchable between a four-way and a three-way valve according to claim 2, wherein: when the stopping component (22) of the control component is a gear stopping component, the stopping component (22) comprises a gear and a limiting pin, and the rotation of the screw rod (32) is limited through the interference of the limiting pin on the rotation of the gear, so that the valve core (31) is prevented from freely sliding in the stopping state of the stepping motor or sliding due to the pressure difference between the two ends.
4. A diverter valve structure switchable between a four-way and a three-way valve according to claim 2, wherein: when the stop component (22) of the control component is friction stop, the stop component (22) comprises a friction block and a friction wheel with large friction force, and the rotation of the screw rod (32) is limited through the friction action between the friction block and the friction wheel so as to prevent the valve core (31) from freely sliding under the stop state of the stepping motor or sliding due to the pressure difference between the two ends.
5. A diverter valve structure switchable between a four-way and a three-way valve according to claim 1, wherein: when the control component (20) is a differential pressure transmission pressure cavity, the slide valve (30) comprises a valve core (31) capable of moving left and right and a connecting rod (35) connected to two ends of the valve core (31), the differential pressure transmission pressure cavity comprises a left pressure cavity (33) and a right pressure cavity (34) which are positioned at two ends of the valve core (31) in the cylinder (10), and the outer end of the connecting rod (35) is connected with a slide door of the left pressure cavity (33) and the right pressure cavity (34); the left pressure chamber (33) and the right pressure chamber (34) are respectively communicated with different fluid pressures to control the left and right movement of the valve core (31).
6. A diverter valve structure switchable between a four-way and a three-way valve according to claim 1, wherein: the left inner channel (11) and the right inner channel (12) are outlets of the switching valve, and the left outer channel (13) and the right outer channel (14) are inlets of the switching valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921138258.2U CN210218786U (en) | 2019-07-19 | 2019-07-19 | Change-over valve structure that can switch between cross and tee bend |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921138258.2U CN210218786U (en) | 2019-07-19 | 2019-07-19 | Change-over valve structure that can switch between cross and tee bend |
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| Publication Number | Publication Date |
|---|---|
| CN210218786U true CN210218786U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921138258.2U Active CN210218786U (en) | 2019-07-19 | 2019-07-19 | Change-over valve structure that can switch between cross and tee bend |
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| CN (1) | CN210218786U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274054A (en) * | 2019-07-19 | 2019-09-24 | 西安交通大学 | A kind of switching valve that can switch between four-way and threeway |
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2019
- 2019-07-19 CN CN201921138258.2U patent/CN210218786U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274054A (en) * | 2019-07-19 | 2019-09-24 | 西安交通大学 | A kind of switching valve that can switch between four-way and threeway |
| CN110274054B (en) * | 2019-07-19 | 2024-03-26 | 西安交通大学 | Switching valve capable of switching between four-way and three-way |
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