Ultrahigh-pressure large-flow high-efficiency switch valve

Abstract

The invention discloses an ultrahigh-pressure large-flow high-efficiency switch valve, relates to the technical field of fluid control valves, and aims to solve the problem that when an existing valve faces ultrahigh-pressure fluid, the ultrahigh-pressure fluid is difficult to block by unlimitedly increasing the power of an air cylinder and the sectional area of an air cylinder piston. The ultrahigh-pressure large-flow high-efficiency switch valve comprises an upper valve seat, the upper valve seat comprises a first fluid channel and a second fluid channel, the upper valve seat further comprises a circulation cavity, one end of the circulation cavity is communicated with the first fluid channel, and the other end of the circulation cavity is communicated with the second fluid channel; one end of the connecting piece is connected with the upper valve seat, and the other end of the connecting piece is connected with the lower valve seat; and the lower valve seat comprises a volume cavity and a driving structure, a fixing piece is arranged in the volume cavity and comprises a valve element cavity, valve elements are arranged in the valve element cavity and the circulation cavity, and the valve elements are used for opening or closing the first fluid channel.

Description

Technical Field

[0001] The invention relates to the technical field of fluid control valves, and in particular to an ultra-high pressure, large flow and high efficiency switch valve. Background Art

[0002] Ultra-high pressure large flow switch valves are usually used in systems that need to handle high-pressure fluids and have high working pressure and flow characteristics. This type of valve is usually used in equipment in the fields of industry, chemical industry, energy, etc. to control the flow direction of the fluid. The main function of the ultra-high pressure flow switch valve is to control the flow direction of the fluid according to the system requirements, and automatically open or close the valve when the fluid flow direction needs to be changed.

[0003] For example, the patent document "Large Flow High Pressure Pneumatic Switch Valve" with authorization announcement number CN103115187B includes: a main valve and an electromagnet, the electromagnet is located above the main valve and is fixed to the main valve by bolts, the electromagnet includes an electromagnet bracket, an upper electromagnet and a lower electromagnet, the main valve includes a valve body, a valve cover, a valve sleeve, a spring, a valve core seat and a valve core, and the valve core includes a conical valve core with a threaded hole, a valve core rod and a rubber ring; to solve the problem that the energy available value of high-pressure gas is reduced due to friction and the like when passing through an ordinary valve and the flow rate is small, it can improve the energy utilization rate of equipment such as compressed air energy storage and power supply, and at the same time, it is composed of an electromagnet part and a main valve part, which reduces the complexity and instability of the equipment. When the valve needs to be opened and closed, as long as the electromagnet is energized or de-energized, the electromagnet responds quickly, so the opening and closing actions of the valve respond extremely quickly, and quick and rapid opening and closing can be achieved, meeting the requirements of pneumatic vehicles for rapid response.

[0004] However, due to structural limitations, the existing valves use cylinders to provide power to block and seal the fluid. As the flow rate increases or the pressure increases, greater power is required to block and seal the fluid. This structure can only achieve this effect by infinitely enlarging the cross-sectional area of ​​the cylinder piston. However, the power of the cylinder and the cross-sectional area of ​​the cylinder piston are limited, and it is impossible to block the ultra-high-pressure fluid by infinitely increasing the cylinder power and the cross-sectional area of ​​the cylinder piston. In addition, the existing valve installation procedure is complicated and it is not convenient to disassemble and assemble the valve. Therefore, the present invention provides an ultra-high-pressure, large-flow, and high-efficiency switch valve to solve the problem that when existing valves face ultra-high-pressure fluids, it is difficult to block the ultra-high-pressure fluids by infinitely increasing the cylinder power and the cross-sectional area of ​​the cylinder piston. Summary of the invention

[0005] The purpose of the present invention is to provide an ultra-high pressure, large flow and high efficiency switching valve to solve the problem that the existing valves proposed in the above background technology are difficult to block ultra-high pressure fluid by unlimitedly increasing the cylinder power and the cross-sectional area of ​​the cylinder piston when facing ultra-high pressure fluid.

[0006] To achieve the above object, the present invention provides the following technical solution: an ultra-high pressure, large flow and high efficiency switch valve, comprising: An upper valve seat, the upper valve seat comprising a first fluid channel and a second fluid channel, the first fluid channel being arranged at one end of the top of the upper valve seat, the second fluid channel being arranged at one end of the side of the upper valve seat, the upper valve seat further comprising a flow cavity, one end of the flow cavity being connected to the first fluid channel, and the other end being connected to the second fluid channel; A connecting piece, one end of which is connected to the upper valve seat and the other end of which is connected to the lower valve seat; The lower valve seat comprises a volume cavity and a driving structure, a fixing part is arranged in the volume cavity, the fixing part comprises a valve core cavity, a valve core is arranged in the valve core cavity and the flow cavity, the valve core is used to open or close the first fluid channel, the driving structure is arranged on one side of the bottom of the lower valve seat, and the driving structure is used to push the valve core.

[0007] Preferably, the first fluid channel includes a first flow cavity and a mold cavity, the first flow cavity is connected to one end of the mold cavity, and the other end of the mold cavity is connected to one end of the circulation cavity, the second fluid channel includes a second flow cavity, and the second flow cavity is connected to the other end of the circulation cavity, and the sealing head is used to close the mold cavity to realize the closure of the switch valve.

[0008] Preferably, the valve core includes a sealing head and a sealing rod, the sealing head is arranged at one end of the sealing rod away from the driving mechanism, the sealing head is made of a rigid material, the diameter of the sealing head is larger than the diameter of the cavity, one end of the sealing rod is connected to the sealing head, and the other end serves as a force-bearing end and is pushed by the driving mechanism.

[0009] Preferably, an upper connecting thread is provided at one end of the connecting piece, and the upper connecting thread is used to connect the connecting piece and the upper valve seat. A fixing cover is provided at the other end of the connecting piece, and a lower connecting thread is provided on the outer side of the fixing cover, and the lower connecting thread is used to connect the fixing cover and the lower valve seat. The connecting piece is connected to the lower valve seat through the fixing cover.

[0010] Preferably, a pressure-bearing sheet and a sealing ring are provided between the circulation cavity and the connecting piece, the pressure-bearing sheet is used to support the sealing head pressed down when the switch valve is opened, and the sealing ring is provided between the pressure-bearing sheet and the connecting piece, and the sealing ring is used to deform and seal the circulation cavity.

[0011] Preferably, a positioning protrusion is provided in the volume cavity, and the positioning protrusion plays a guiding role.

[0012] Preferably, a sealing rod retaining ring is provided at one end of the fixing member away from the upper valve seat, and the sealing rod retaining ring is used to limit the offset of the bottom of the sealing rod.

[0013] Preferably, the lower valve seat is provided with a sealing ring to prevent gas or liquid from leaking, resulting in failure to build up power.

[0014] Preferably, a lower sealing cover is provided at one end of the lower valve seat away from the connecting piece, and the lower sealing cover is detachably connected to the lower valve seat.

[0015] Preferably, the first fluid channel is detachably connected to the upper valve seat, and the detachable connection is a threaded connection.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention redesigns and adjusts the internal structure of the ultra-high pressure and large flow switching valve so that when the switch valve is closed, the actuator initially pushes the valve core to the closed position, and then the ultra-high pressure fluid applies sealing head pressure to the valve core, and there is no need for the actuator to output force to maintain the valve closed, which greatly reduces the load of the actuator, realizes the self-closing process of the switch valve after closing, and effectively blocks the conduction of the ultra-high pressure and large flow fluid; when the switch valve of the present invention is turned on, the actuator controls the valve core to the conduction position, and then the fluid's own pressure presses down the valve core, and there is no need for the actuator to output force to maintain the valve open, realizing the self-conduction process after the switch valve is turned on, and effectively conducts the ultra-high pressure and large flow fluid.

[0017] The old valve requires a large piston area to provide blocking sealing force. In the actual production process, it is difficult to further improve the sealing force through engineering means, and it is difficult to miniaturize the switch valve. The switch valve of the present invention can effectively block / conduct ultra-high pressure and large flow fluids, and can effectively reduce the size of the valve to be suitable for a wider range of production fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 It is a cross-sectional schematic diagram showing the closing of the switch valve in Embodiment 1 of the present invention; Figure 3 It is a cross-sectional schematic diagram showing the opening of the switch valve in Embodiment 1 of the present invention; Figure 4 It is a cross-sectional schematic diagram showing the closing of the switch valve in Embodiment 2 of the present invention; Figure 5 It is a cross-sectional schematic diagram showing the opening of the switch valve in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention; Figure 7 It is a cross-sectional schematic diagram showing the closing of the switch valve in Embodiment 3 of the present invention; Figure 8 It is a cross-sectional schematic diagram showing the opening of the switch valve in Embodiment 3 of the present invention; Fig. 9 It is a cross-sectional schematic diagram showing the closing of the switch valve in Embodiment 4 of the present invention; Fig.10 It is a cross-sectional schematic diagram showing the opening of the switch valve in Embodiment 4 of the present invention; Fig.11 A schematic cross-sectional view showing the closing of the switch valve in Embodiment 5 of the present invention; Fig.12 A cross-sectional schematic diagram showing the opening of the switch valve in Example 5 of the present invention; Fig.13 A schematic cross-sectional view showing the closing of the switch valve in Example 6 of the present invention; Fig.14 A cross-sectional schematic diagram showing the opening of the switch valve in Example 6 of the present invention.

[0019] In the figure: 100, upper valve seat; 110, first fluid channel; 113, first flow chamber; 114, mold cavity; 120, second fluid channel; 123, second flow chamber; 130, circulation chamber; 140, valve core; 141, sealing head; 142, pressure-bearing plate; 143, sealing ring; 200, connecting piece; 210, upper connecting thread; 220, fixing cover; 221, lower connecting thread; 240, anti-leakage sealing ring; 263, sealing rod; 264, sealing rod retaining ring; 300, lower valve seat; 310, volume chamber; 311, positioning protrusion; 320, fixing piece; 321, valve core chamber; 330, pushing mechanism; 340, lower sealing cover; 400, sealing O-ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1

[0022] See also Figure 1-Figure 3 , an embodiment of the present invention: an ultra-high pressure, large flow and high efficiency switch valve, comprising: The upper valve seat 100 includes a first fluid channel 110 and a second fluid channel 120. The first fluid channel 110 is arranged at one end of the top of the upper valve seat 100. The first fluid channel 110 includes a first flow cavity 113 and a mold cavity 114. The first flow cavity 113 is connected to one end of the mold cavity 114. The second fluid channel 120 is arranged at one end of the side of the upper valve seat 100. The second fluid channel 120 includes a second flow cavity 123. The second flow cavity 123 is connected to the other end of the circulation cavity 130. The upper valve seat 100 also includes the circulation cavity 130. One end of the circulation cavity 130 is connected to the first fluid channel 110, and the other end is connected to the second fluid channel 120.

[0023] A connecting piece 200 is provided with an upper connecting thread 210 at one end of the connecting piece 200, and the upper connecting thread 210 is used to connect the connecting piece 200 and the upper valve seat 100. A fixing cover 220 is provided at the other end of the connecting piece 200, and a lower connecting thread 221 is provided on the outer side of the fixing cover 220. The lower connecting thread 221 is used to connect the fixing cover 220 and the lower valve seat 300. The connecting piece 200 is connected to the lower valve seat 300 through the fixing cover 220.

[0024] A pressure-bearing sheet 142 and a sealing ring 143 are provided between the circulation cavity 130 and the connecting piece 200. The pressure-bearing sheet 142 is used to support the sealing head 141 that is pressed down when the switch valve is opened. The sealing ring 143 is provided between the pressure-bearing sheet 142 and the connecting piece 200. The sealing ring 143 is used to deform and seal the circulation cavity 130. The pressure-bearing sheet 142 is made of a rigid material, and the sealing ring 143 is made of wear-resistant, plastic, and high-temperature resistant materials such as ultra-high molecular polyethylene (UHMWPE), PEEK, nylon, and copper.

[0025] The lower valve seat 300 is provided with a leak-proof sealing ring 240, which prevents gas or liquid leakage. The lower valve seat 300 includes a volume chamber 310 and a driving structure. A positioning protrusion 311 and a fixing member 320 are provided in the volume chamber 310. The positioning protrusion 311 plays a guiding role. The fixing member 320 includes a valve core chamber 321. The valve core chamber 321 and the flow chamber 130 are provided with a valve core 140. The valve core 140 includes a sealing head 141 and a sealing Rod 263, the sealing head 141 is arranged at the end of the sealing rod 263 away from the pushing mechanism 330, the diameter of the sealing head 141 is larger than the diameter of the cavity 114, one end of the sealing rod 263 is connected to the sealing head 141, and the other end serves as the force-bearing end. The sealing rod 263 is pushed by the pushing mechanism 330 to drive the sealing head 141 to move forward. A sealing rod retaining ring 264 is also arranged at the end of the fixing part 320 away from the upper valve seat 100, and the sealing rod retaining ring 264 is used to limit the bottom offset of the sealing rod 263.

[0026] A lower sealing cover 340 is provided at one end of the lower valve seat 300 away from the connecting piece 200. The lower sealing cover 340 is detachably connected to the lower valve seat 300. The specific connection method may be a detachable connection such as a threaded connection or a snap connection. The lower sealing cover 340 is removed to open the bottom end of the lower valve seat 300 so as to set the driving structure at the bottom end of the lower valve seat 300. In this embodiment, the driving structure is a hydraulic cylinder. It is easy for those skilled in the art to know that in other embodiments, the driving structure is not limited to hydraulic cylinders and air cylinders. As long as it is a mechanical structure that can provide driving force, it can be used as a driving structure, such as an electric cylinder or a piston driven by a motor.

[0027] In this embodiment, the sealing head 141 is an arc-shaped raised sealing head.

[0028] The material of the sealing head 141 is determined by technical personnel in this field according to the specific pressure of the actual ultra-high pressure fluid. Stainless steel is selected by default to seal the cavity 114. A harder material is selected to avoid deformation under the ultra-high pressure of the fluid, resulting in sealing failure and failure of the switch valve.

[0029] Working principle: When the switch valve is working and switches to the closed state, the valve core 140 is initially pushed to the closed position by the actuator, and the ultra-high pressure fluid is input through the second fluid channel 120. The ultra-high pressure fluid gives pressure to the sealing head 141 of the valve core 140, realizing the self-closing process of the switch valve after it is closed; when the switch valve is switched to the on state, the ultra-high pressure fluid pressure outside the second fluid channel 120 is released by the outside world, so that the fluid in the switch valve returns to normal pressure, and the valve core 140 is controlled to the on position by the actuator, and the fluid is input through the first fluid channel 110 or the second fluid channel 120. The valve core 140 is pressed down by the fluid's own pressure, realizing the self-guiding process after the switch valve is turned on, and realizing the two-way conduction of the switch valve.

[0030] Example 2

[0031] See also Figure 4-Figure 5 Based on the embodiment 1, further improvement is made by changing the sealing head 141 in the embodiment 1 from an arc-shaped raised sealing head to a conical raised sealing head, so as to reduce the possibility of relative sliding between the arc-shaped raised sealing head and the cavity 114 under the action of ultra-high pressure fluid, thereby improving the ultra-high pressure bearing capacity of the switch valve.

[0032] Example 3

[0033] See also Figure 6-Figure 8 , further improved on the basis of Example 1, the first fluid channel 110 is detachably connected to the upper valve seat 100, and the detachable connection method is a threaded connection. When the switch valve is opened, the conical surface at the first flow chamber 113 needs to play a sealing role. Under the condition of ultra-high pressure and large flow, the sealing conical surface will also be enlarged. The larger the conical surface, the more difficult it is to seal there. The first fluid channel 110 and the upper valve seat 100 are set to be detachably connected, and a soft seal is used to solve this problem, thereby improving the overall service life of the switch valve. The first fluid channel 110 with a larger or smaller caliber can also be replaced according to actual needs to improve the scope of application of the switch valve.

[0034] Example 4

[0035] See also Figure 9-10, based on the third embodiment, a further improvement is made by adding a sealing O-ring 400 to the original structure of the cavity 114 to prevent the sealing head 141 from being excessively deformed under the action of the high-pressure fluid and rushing out of the constraint range of the cavity 114, causing the serious consequence that the switch valve loses its function. By setting the sealing O-ring 400, the ultra-high-pressure and large-flow fluid bearing capacity of the switch valve is further improved, thereby increasing the scope of application of the switch valve.

[0036] Example 5

[0037] See also Figure 11-Figure 12 Based on the embodiment 3, further improvement is made by changing the sealing head 141 in the embodiment 3 from an arc-shaped raised sealing head to a conical raised sealing head, so as to reduce the possibility of relative sliding between the arc-shaped raised sealing head and the cavity 114 under the action of the ultra-high pressure fluid, thereby improving the ultra-high pressure bearing capacity of the switch valve.

[0038] Example 6

[0039] See also Figure 13-14 , based on further improvement on the basis of Example 5, a sealing O-ring 400 is added to the original cavity 114 structure. Through the combined use of the conical valve core 140 and the sealing O-ring 400, this sealing method can effectively solve the sealing difficulty problem at the first flow cavity 113 and the problem of being unable to seal when processing materials containing hard particles, further improving the ultra-high pressure and large flow fluid bearing capacity of the switch valve, so as to improve the application range of the switch valve.

[0040] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0041] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An ultra-high pressure, large flow and high efficiency switch valve, characterized in that: include: An upper valve seat (100), the upper valve seat (100) comprising a first fluid channel (110) and a second fluid channel (120), the first fluid channel (110) being arranged at one end of the top of the upper valve seat (100), the second fluid channel (120) being arranged at one end of the side of the upper valve seat (100), the upper valve seat (100) further comprising a flow chamber (130), one end of the flow chamber (130) being connected to the first fluid channel (110), and the other end of the flow chamber being connected to the second fluid channel (120); A connecting piece (200), one end of the connecting piece (200) being connected to the upper valve seat (100), and the other end of the connecting piece (200) being connected to the lower valve seat (300); A lower valve seat (300), the lower valve seat (300) comprising a volume chamber (310) and a driving structure, a fixing member (320) being arranged in the volume chamber (310), the fixing member (320) comprising a valve core chamber (321), a valve core (140) being arranged in the valve core chamber (321) and the flow chamber (130), the valve core (140) being used to open or close the first fluid channel (110), the driving structure being arranged on one side of the bottom of the lower valve seat (300), the driving structure being used to push the valve core (140).

2. The ultra-high pressure, large flow and high efficiency switch valve according to claim 1, characterized in that: The first fluid channel (110) comprises a first flow cavity (113) and a mold cavity (114), wherein the first flow cavity (113) is connected to one end of the mold cavity (114), and the other end of the mold cavity (114) is connected to one end of the circulation cavity (130), and the second fluid channel (120) comprises a second flow cavity (123), and the second flow cavity (123) is connected to the other end of the circulation cavity (130).

3. The ultra-high pressure, large flow and high efficiency switch valve according to claim 2, characterized in that: The valve core (140) comprises a sealing head (141) and a sealing rod (263); the sealing head (141) is arranged at one end of the sealing rod (263) away from the pushing mechanism (330); the diameter of the sealing head (141) is larger than the diameter of the cavity (114); one end of the sealing rod (263) is connected to the sealing head (141), and the other end serves as a force-bearing end and is pushed by the pushing mechanism (330).

4. The ultra-high pressure, large flow and high efficiency switch valve according to claim 3, characterized in that: An upper connecting thread (210) is provided at one end of the connecting piece (200), and the upper connecting thread (210) is used to connect the connecting piece (200) and the upper valve seat (100). A fixing cover (220) is provided at the other end of the connecting piece (200), and a lower connecting thread (221) is provided on the outer side of the fixing cover (220), and the lower connecting thread (221) is used to connect the fixing cover (220) and the lower valve seat (300). The connecting piece (200) is connected to the lower valve seat (300) via the fixing cover (220).

5. The ultra-high pressure, large flow and high efficiency switch valve according to claim 4, characterized in that: A pressure-bearing sheet (142) and a sealing ring (143) are provided between the circulation chamber (130) and the connecting piece (200); the pressure-bearing sheet (142) is used to support the sealing head (141) that is pressed downward when the switch valve is opened; the sealing ring (143) is provided between the pressure-bearing sheet (142) and the connecting piece (200); the sealing ring (143) is used to deform and seal the circulation chamber (130).

6. The ultra-high pressure, large flow and high efficiency switch valve according to claim 5, characterized in that: A positioning protrusion (311) is provided in the volume cavity (310), and the positioning protrusion (311) plays a guiding role.

7. The ultra-high pressure, large flow and high efficiency switch valve according to claim 6, characterized in that: A sealing rod retaining ring (264) is provided at one end of the fixing member (320) away from the upper valve seat (100), and the sealing rod retaining ring (264) is used to limit the offset of the bottom of the sealing rod (263).

8. The ultra-high pressure, large flow and high efficiency switch valve according to claim 7, characterized in that: The lower valve seat (300) is provided with a leakage-proof sealing ring (240), and the leakage-proof sealing ring (240) is used to prevent gas or liquid leakage.

9. The ultra-high pressure, large flow and high efficiency switch valve according to claim 8, characterized in that: A lower sealing cover (340) is provided at one end of the lower valve seat (300) away from the connecting piece (200), and the lower sealing cover (340) is detachably connected to the lower valve seat (300).

10. The ultra-high pressure, large flow and high efficiency switch valve according to claim 1, characterized in that: The first fluid channel (110) is detachably connected to the upper valve seat (100), and the detachable connection is a threaded connection.

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