Metering type ceramic switching valve

Abstract

The utility model relates to the technical field of switching valves, in particular to a metering type ceramic switching valve which comprises a metering unit with a metering pump cavity and a ceramic switching unit communicated with the metering pump cavity to achieve liquid inlet and outlet, the ceramic switching unit comprises a switching ceramic sleeve and a switching ceramic core, the switching ceramic sleeve is provided with a liquid inlet and a liquid outlet, and the switching ceramic core is provided with a liquid outlet. The switching ceramic core is provided with two right-angle through holes which are communicated in the first direction and the second direction, one of the two right-angle through holes in the second direction is normally communicated with the metering pump cavity, and the ceramic switching unit further comprises an air cylinder assembly which drives the through hole in the switching ceramic core in the first direction to rotate in a reciprocating mode and is communicated with the liquid inlet and the liquid outlet in a switching mode. The metering pump cavity is provided with a wrapping part which wraps the switching ceramic sleeve and is sealed with the switching ceramic sleeve, and the wrapping part is provided with a connector communicated with the liquid inlet and the liquid outlet. The automatic liquid inlet and outlet switching device is scientific and reasonable in structural design, easy to implement and capable of achieving the automatic liquid inlet and outlet switching function and has good application and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of switching valves, in particular to a metering ceramic switching valve. Background Art

[0002] The switching valve (forced valve) is a pneumatic switch valve installed at the hot end of the switching heat exchanger (or cold storage device), which uses the connecting rod structure principle to realize the opening and closing of the valve plate.

[0003] However, the existing switching valve has some defects and shortcomings:

[0004] 1. At present, the metering pump valves on the market use a diaphragm valve, which is easy to be damaged and malfunction;

[0005] 2. At present, the metering pump valves on the market use the second-hand check valve, and the spring inside the valve is easy to lose its elasticity, causing the check valve to fail;

[0006] 3. The valves used in the metering pumps require irregular maintenance, which results in high maintenance costs;

[0007] 4. Under liquid pressure, the one-way valve and diaphragm valve are not sensitive and are prone to jamming. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a metering ceramic switching valve.

[0009] The utility model is realized through the following technical scheme: a metering ceramic switching valve, comprising: a metering unit with a metering pump cavity and a ceramic switching unit connected with the metering pump cavity to realize liquid inlet and outlet, the ceramic switching unit comprising a switching ceramic sleeve and a switching ceramic core rotatably sleeved in the switching ceramic sleeve, the switching ceramic sleeve having a liquid inlet and a liquid outlet arranged in a first direction and penetrating the switching ceramic sleeve, the switching ceramic core having two right-angle through holes connected in the first direction and in the second direction, one of the two right-angle through holes in the second direction being always connected with the metering pump cavity, the ceramic switching unit also comprising a cylinder assembly driving the through hole in the first direction on the switching ceramic core to reciprocate and switch between the liquid inlet and the liquid outlet; the metering pump cavity having a wrapping portion wrapping the switching ceramic sleeve and sealed with the switching ceramic sleeve, the wrapping portion being provided with a joint connected with the liquid inlet and the liquid outlet.

[0010] Furthermore, the wrapping portion is integrally formed with the metering pump cavity, and a liquid hole connected to the interior of the metering pump cavity is provided at the bottom of the wrapping portion. The liquid hole coincides with the center line of the two right-angle through holes in the second direction, and an annular groove for placing the first sealing ring is provided on the circumferential edge of the liquid hole.

[0011] Furthermore, the cylinder assembly includes a solenoid valve, a rotating cylinder, a fixed seat and a ceramic core seat. The solenoid valve controls the operation of the rotating cylinder. The fixed seat is arranged at the output end of the rotating cylinder and is connected to the ceramic core seat by screws, switching the ceramic core and the ceramic core seat to be fixedly connected.

[0012] Furthermore, the rotation angle of the rotary cylinder is 180 degrees.

[0013] Furthermore, the metering unit includes a base with a linear guide rail, a slide seat slidably mounted on the base and having a threaded through hole, a ball screw threadedly matched with the threaded through hole and used to push the slide seat to reciprocate along the linear guide rail, a metering ceramic core slidably mounted in the metering pump cavity and driven by the slide seat, and a servo motor driving the ball screw to rotate.

[0014] Furthermore, the switching ceramic sleeve has a small diameter end and a large diameter end coaxial with the small diameter end, the large diameter end and the small diameter end are stepped, a flange pan-plug seal is provided on the port of the large diameter end, and a rotating seal is provided at the contact end between the flange pan-plug seal and the step surface.

[0015] Furthermore, the switching ceramic core passes through the flange seal and extends to the small-diameter end, and the liquid inlet and outlet are communicated with the inside of the small-diameter end.

[0016] Furthermore, the two relative side surfaces of the switching ceramic core at the connection of the ceramic core seat are set as planes, the adjacent side surfaces are set as arc-shaped surfaces, and the ceramic core seat is provided with a mounting groove matching it, the switching ceramic core is provided with pin holes passing through the two side planes, and the ceramic core seat is provided with pin holes corresponding to the pin holes.

[0017] Furthermore, the switching ceramic core and the switching ceramic sleeve are made of high-precision wear-resistant ceramics.

[0018] Furthermore, the outer sliding sleeve of the metering ceramic core is provided with a metering ceramic sleeve embedded in the port of the metering pump cavity, and a second sealing ring is provided at the connection between the metering ceramic sleeve and the metering pump cavity.

[0019] The beneficial effects of the utility model are:

[0020] 1. The structural design of the utility model is scientific and reasonable, easy to implement, and can realize the automatic liquid inlet-liquid outlet switching function. It has good application and promotion value. The original valve structure of the metering pump is changed into a ceramic reversing form, that is, a ceramic switching valve composed of a switching ceramic core and a switching ceramic sleeve. The switching ceramic core inside the switching valve has a right-angled two-way hole, and the bottom hole is often connected to the liquid stored in the metering pump cavity. The switching ceramic sleeve has an inlet and an outlet facing a first direction. The side holes of the right-angled two-way hole are limited by the starting position of the rotating cylinder, and a single-way inlet or outlet is used to switch the liquid inlet or outlet. The use of the rotating cylinder starting position limit can realize a one-way channel, and it will not get stuck in the middle, resulting in the inlet and the outlet being blocked. It is driven by a rotating cylinder, and the driving force is adjustable, and the valve will not be delayed or stuck.

[0021] 2. The ceramic switching valve uses high-precision wear-resistant ceramics with a smooth surface, long service life, and low maintenance cost. The ceramic valve has a small gap, can withstand liquid pressure, and is not prone to failure.

[0022] 3. Use a cylinder to drive the ceramic for reversing. The pneumatic pressure is adjustable and the operating angle is 180°. Ensure that the liquid inlet or outlet is open. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model from one perspective;

[0024] Figure 2 It is the front view of the utility model;

[0025] Figure 3 It is a cross-sectional view of the utility model;

[0026] Figure 4 for Figure 2 A cross-sectional view at BB is shown;

[0027] Figure 5 It is a structural schematic diagram of the switching ceramic sleeve in the utility model;

[0028] Figure 6 It is a schematic diagram of the structure of the switching ceramic core in the utility model. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] See also Figure 1 and Figure 2 , this embodiment provides a metering ceramic switching valve, including a metering unit 10 and a ceramic switching unit 20;

[0031] Metering unit 10 is used to measure the amount of liquid discharged, see Figure 3The metering unit 10 includes a base 11, a metering pump cavity 12, a slide 13, a ball screw 14, a metering ceramic core 15, a metering ceramic sleeve 16 and a servo motor 17. The base 11 is provided with a linear guide rail, the slide 13 is slidably arranged on the base 11, and the slide 13 is provided with a threaded through hole along the length direction. The servo motor 17 is installed on one side of the base 11, and the output end of the servo motor 17 is connected to the ball screw 14 through a coupling, and the ball screw 14 is connected to the threaded through hole of the slide 13. The metering pump cavity 12 is arranged on the other side of the base 11, and the metering pump cavity 12 has a port. The metering ceramic sleeve 16 is embedded in the port of the metering pump cavity 12, and the metering ceramic sleeve 16 A second sealing ring is provided at the connection with the metering pump cavity 12, the metering ceramic core 15 is slidably sleeved in the metering ceramic sleeve 16, and one end of the metering ceramic core 15 extends to the metering pump cavity 12, and the other end of the metering ceramic core 15 is connected to the slide 13 through a direction joint. The metering pump cavity 12 is used for storing liquid, and the servo motor 17 is started to drive the ball screw 14 to rotate, so that the ball screw 14 pushes the slide 13 to move back and forth along the linear guide rail, thereby driving the metering ceramic core 15 to move forward or backward in the metering pump cavity 12 to realize liquid storage or discharge in the metering pump cavity 12; the ball screw 14 is used to push the slide 13 to move and drive the metering ceramic core 15 to move back and forth, thereby effectively ensuring the accuracy of the liquid discharge.

[0032] The ceramic switching unit 20 is used to switch the liquid inlet or outlet, see Figure 4 and Figure 5 The ceramic switching unit 20 includes a switching ceramic sleeve 21, a switching ceramic core 22 and a cylinder assembly 23. The switching ceramic sleeve 21 has a small diameter end 212 and a large diameter end 213 coaxial with the small diameter end 212. The large diameter end 213 and the small diameter end 212 are stepped. A flange pan-seal 24 is provided on the port of the large diameter end 213. A rotating seal is provided at the contact end of the flange pan-seal 24 and the step surface. The small diameter end 212 is provided with a liquid inlet 210 and a liquid outlet 211 arranged in a first direction and connected to the inside of the small diameter end 212. One end of the switching ceramic core 22 passes through the method The flange plug seal 24 extends to the small diameter end 212 and rotates with the small diameter end 212 and the flange plug seal 24. The other end of the switching ceramic core 22 is connected to the cylinder assembly 23. The switching ceramic core 22 is provided with two right-angle through holes 220 connected in the first direction and in the second direction. One of the two right-angle through holes 220 in the second direction is always connected to the metering pump cavity 12. The cylinder assembly 23 drives the switching ceramic core 22 to reciprocate the switching ceramic core 22 in the first direction, thereby realizing the switching connection between the liquid inlet 210 and the liquid outlet 211.

[0033] When the cylinder assembly 23 drives the switching ceramic core 22 to rotate counterclockwise or clockwise, so that the two right-angle through holes 220 are connected to the liquid inlet 210 in the first direction, the servo motor 17 starts to drive the ball screw 14 to rotate counterclockwise or clockwise, so that the ball screw 14 pushes the slide 13 to move along the linear guide rail, and the metering ceramic core 15 moves toward the back of the metering pump cavity 12 to start liquid inlet, and the liquid inlet is completed; when the cylinder assembly 23 drives the switching ceramic core 22 to rotate counterclockwise or clockwise, so that the two right-angle through holes 220 are connected to the liquid outlet 211 in the first direction, the servo motor 17 starts to drive the ball screw 14 to rotate counterclockwise or clockwise, so that the ball screw 14 pushes the slide 13 to move forward along the linear guide rail, and the metering ceramic core 15 moves toward the front of the metering pump cavity 12 to start liquid discharge. After the liquid discharge is completed, the ceramic switching unit 20 switches its direction to the liquid inlet 210, and the above steps are repeated again.

[0034] In an embodiment, the metering pump cavity 12 has a wrapping portion 120 that wraps the switching ceramic sleeve 21 and seals with the switching ceramic sleeve 21. The wrapping portion 120 is integrally formed with the metering pump cavity 12, and the wrapping portion 120 is provided with a joint 121 connected to the liquid inlet 210 and the liquid outlet 211. The bottom of the wrapping portion 120 is provided with a liquid hole 122 connected to the interior of the metering pump cavity 12. The liquid hole 122 coincides with the center line of the through hole of the two right-angle through holes 220 in the second direction. The circumferential edge of the liquid hole 122 is provided with an annular groove for placing a first sealing ring. During the rotation of the switching ceramic core 22, the liquid hole 122 and the through hole of the two right-angle through holes 220 in the second direction always remain connected, and the liquid flows into the metering pump cavity 12 from the liquid hole 122, and the liquid then flows out from the liquid hole 122.

[0035] In the embodiment, the cylinder assembly 23 includes an electromagnetic valve 230, a rotating cylinder 231, a fixed seat 232 and a ceramic core seat 233. The electromagnetic valve 230 controls the operation of the rotating cylinder 231. The fixed seat 232 is arranged at the output end of the rotating cylinder 231 and is connected to the ceramic core seat 233 by screws. The ceramic core 22 is switched to be fixedly connected to the ceramic core seat 233. The pneumatic pressure of the rotating cylinder 231 is adjustable, and the operating angle is 180°, ensuring that the liquid inlet 210 or the liquid outlet 211 is connected to the through hole on the right-angle two through holes 220 facing the first direction; using the starting position limit of the rotating cylinder 231, a one-way channel can be realized, and it will not be stuck in the middle, causing the liquid inlet 210 and the liquid outlet 211 to be blocked.

[0036] Also, see Figure 6The two opposite sides of the switching ceramic core 22 at the connection of the ceramic core seat 233 are set as planes 221, and the adjacent sides are set as arcuate surfaces 222, and the ceramic core seat 233 is provided with a mounting groove that matches it, and the switching ceramic core 22 is provided with a pin hole 223 that passes through the two side planes 221, and the ceramic core seat 233 is provided with a plug hole 223 corresponding to the pin hole 223, and then the pin can be inserted into the corresponding pin hole 223 and the plug hole 223, so that the ceramic core seat 233 and the switching ceramic core 22 are fixed. Through this arrangement, when the rotating cylinder 231 drives the switching ceramic core 22 to rotate, it can effectively drive the switching ceramic core 22 to rotate, avoiding the occurrence of signs of thread slippage.

[0037] Furthermore, the switching ceramic core 22 and the switching ceramic sleeve 21 are made of high-precision wear-resistant ceramics. The switching ceramic core 22 and the switching ceramic sleeve 21 are made of high-wear-resistant smooth ceramics, which have a smooth surface, long service life, low maintenance cost, small ceramic valve gap, can withstand liquid pressure, and are not prone to failure.

[0038] In summary, the structural design of the utility model is scientific and reasonable, easy to implement, can realize the automatic liquid inlet-liquid outlet switching function, and has good application and promotion value. The original valve structure of the metering pump is changed into a ceramic reversing form, that is, a ceramic switching valve composed of a switching ceramic core 22 and a switching ceramic sleeve 21. The switching ceramic core inside the switching valve has a right-angled two-way hole 220, and the bottom hole is often connected to the liquid stored in the metering pump cavity 12. The switching ceramic sleeve 21 has a liquid inlet 210 and a liquid outlet 211 facing the first direction. The side holes of the right-angled two-way hole 220 are limited by the starting position of the rotating cylinder 231, and the single-way liquid inlet 210 or liquid outlet 211 is used to switch the liquid inlet or liquid outlet. The starting position of the rotating cylinder 231 is used to limit the position, so that a one-way channel can be realized, and it will not be stuck in the middle, resulting in the liquid inlet 210 and the liquid outlet 211 being blocked. The rotating cylinder 231 is used for driving, and the driving force is adjustable, and the valve will not be delayed or stuck.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A metering ceramic switching valve, comprising: A metering unit having a metering pump cavity and a ceramic switching unit connected to the metering pump cavity to realize liquid inlet and outlet, characterized in that the ceramic switching unit includes a switching ceramic sleeve and a switching ceramic core rotatably mounted in the switching ceramic sleeve, the switching ceramic sleeve is provided with a liquid inlet and a liquid outlet arranged in a first direction and penetrating the switching ceramic sleeve, the switching ceramic core is provided with two right-angle through holes connected in the first direction and in the second direction, one of the two right-angle through holes in the second direction is always connected to the metering pump cavity, the ceramic switching unit also includes a cylinder assembly that drives the through hole in the first direction on the switching ceramic core to reciprocate and switch between the liquid inlet and the liquid outlet; the metering pump cavity has a wrapping portion that wraps the switching ceramic sleeve and is sealed with the switching ceramic sleeve, and the wrapping portion is provided with a joint connected to the liquid inlet and the liquid outlet.

2. The metering ceramic switching valve according to claim 1, characterized in that: The wrapping part is integrally formed with the metering pump cavity, and a liquid hole connected to the interior of the metering pump cavity is provided at the bottom of the wrapping part. The liquid hole coincides with the center line of the two right-angle through holes in the second direction, and an annular groove for placing the first sealing ring is provided on the circumferential edge of the liquid hole.

3. The metering ceramic switching valve according to claim 1, characterized in that: The cylinder assembly includes a solenoid valve, a rotary cylinder, a fixed seat and a ceramic core seat. The solenoid valve controls the operation of the rotary cylinder. The fixed seat is arranged at the output end of the rotary cylinder and is connected to the ceramic core seat by screws, switching the ceramic core to be fixedly connected to the ceramic core seat.

4. The metering ceramic switching valve according to claim 3, characterized in that: The rotation angle of the rotary cylinder is 180 degrees.

5. The metering ceramic switching valve according to claim 1, characterized in that: The metering unit includes a base with a linear guide rail, a slide seat slidably arranged on the base and having a threaded through hole, a ball screw threadedly matched with the threaded through hole and used to push the slide seat to reciprocate along the linear guide rail, a metering ceramic core slidably arranged in the metering pump cavity and driven by the slide seat, and a servo motor driving the ball screw to rotate.

6. The metering ceramic switching valve according to claim 1, characterized in that: The switching ceramic sleeve has a small diameter end and a large diameter end coaxial with the small diameter end. The large diameter end and the small diameter end are stepped. A flange pan-plug seal is provided on the port of the large diameter end. A rotating seal is provided at the contact end between the flange pan-plug seal and the step surface.

7. The metering ceramic switching valve according to claim 6, characterized in that: The switching ceramic core passes through the flange plug seal and extends to the small-diameter end, and the liquid inlet and outlet are communicated with the inside of the small-diameter end.

8. The metering ceramic switching valve according to claim 3, characterized in that: The two relative side surfaces of the switching ceramic core at the connection of the ceramic core seat are set as planes, the adjacent side surfaces are set as arc surfaces, and the ceramic core seat is provided with a mounting groove that matches it. The switching ceramic core is provided with pin holes that pass through the two side planes, and the ceramic core seat is provided with pin holes corresponding to the pin holes.

9. The metering ceramic switching valve according to claim 1, characterized in that: The switching ceramic core and switching ceramic sleeve are made of high-precision wear-resistant ceramics.

10. The metering ceramic switching valve according to claim 5, characterized in that: The outer sliding sleeve of the metering ceramic core is provided with a metering ceramic sleeve embedded in the port of the metering pump cavity, and a second sealing ring is provided at the connection between the metering ceramic sleeve and the metering pump cavity.

Images