An automatic drainage pneumatic control valve and a pneumatically controlled automatic drainage device

Abstract

This utility model discloses an automatic drainage pneumatic control valve, including a valve body. The valve body is provided with an air inlet, an air vent, a working hole, a valve stem, and a triggering pilot device. The working hole is used to connect with the mounting cavity of the automatic drainage pneumatic control valve. The valve stem can slide within the valve body, allowing it to be in a first position or a second position. In the first position, the air inlet communicates with the working hole; in the second position, the air vent communicates with the working hole. Two triggering pilot devices are respectively located at both ends of the valve body. One device pushes the valve stem from the first position to the second position, and the other pushes the valve stem from the second position to the first position. A camshaft is mounted between the two triggering pilot devices. The camshaft has two cams with different far-repose angles. Each cam contacts a control rod on one of the triggering pilot devices, achieving convenient installation, stable operation, and easy maintenance.

Description

Technical Field

[0001] This utility model relates to the field of building materials equipment, and in particular to a continuous curing equipment and curing method. Background Technology

[0002] During underground construction, significant water seepage can occur, leading to groundwater accumulation that needs to be pumped out promptly. However, groundwater seepage is a slow, cumulative process. Conventional pumping systems require shutting down the pump after each pumping operation and restarting it only after the groundwater has accumulated to a certain depth, which is cumbersome. Furthermore, the pumps require cables to power the underwater motors, and damage to the cable's insulation could pose a safety hazard.

[0003] To address the aforementioned issues, patent CN 216278705 U, entitled "Dual-Control Pneumatic Water Pump," discloses a dual-control pneumatic water pump. The pump includes a drain cylinder with an inlet on one side of its bottom. Lifting lugs are located on both sides of the upper part of the drain cylinder. An outlet pipe is located in the middle of the drain cylinder. An air inlet valve and an air outlet valve are located on both sides of the outlet pipe. An air blowing pipe connects the portions of the air inlet valve and the air outlet valve located inside the drain cylinder. The top of the air outlet valve is connected to a connecting valve via a connecting pipe. The bottom of the connecting valve extends through the top of the drain cylinder to form an air outlet. A float ball is connected to the air blowing pipe via an air valve switch. The air valve switch is connected to an external air pump. One-way valves are located on both the inlet and outlet pipes. A one-way valve a is connected to the connecting valve via a spring. A filter structure is located on the one-way valve at the inlet, comprising a filter screen and an L-shaped bracket.

[0004] The inflation and deflation control system in the above-mentioned technical solution is relatively complex, requiring inflation valves, deflation valves, connecting valves, and air valve switches to be interconnected and work together to achieve the above functions. This results in inconvenient installation and troubleshooting. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an automatic drainage pneumatic control valve and a pneumatic control automatic drainage device, which has the advantages of convenient installation, stable operation and convenient maintenance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic drainage pneumatic control valve includes a valve body, on which are provided an air inlet, an air vent, a working hole, a valve stem, and a trigger pilot device.

[0008] The air inlet is used to connect to an external air inlet pipe;

[0009] The vent hole is used to connect to an external vent pipe;

[0010] The working hole is used to connect to the mounting cavity of the automatic drain pneumatic control valve;

[0011] The valve stem can slide within the valve body, allowing it to be in a first position or a second position within the valve body. When in the first position, the air inlet is connected to the working hole, and when in the second position, the air outlet is connected to the working hole.

[0012] The trigger pilot device consists of two devices, each located at one end of the valve body. One device is used to push the valve stem from the first position to the second position, and the other device is used to push the valve stem from the second position to the first position. A cam shaft is mounted between the two trigger pilot devices. The cam shaft has two cams with different far-repose angles. Each cam contacts the control rod on one of the trigger pilot devices.

[0013] With the above technical solution, simply rotate the camshaft core so that when one of the cams is at its far repose angle, the cam pushes the control rod of the trigger pilot device, causing the control valve rod of the trigger pilot device to move to the first position, thereby connecting the air inlet and the working hole to achieve air filling; when the camshaft core rotates back to the point where the other cam is at its far repose angle, the other cam pushes the control rod of the other trigger pilot device, causing the control valve rod of the other trigger pilot device to move to the second position, thereby connecting the air outlet and the working hole to achieve air release.

[0014] Preferably, a first sealing element is provided between the valve stem and the valve body, and a second sealing element is provided between the valve body and the trigger pilot device.

[0015] The above technical solutions improve the sealing between the valve stem and the valve body, and between the valve body and the pilot trigger device.

[0016] Preferably, the triggering pilot device is provided with a first cavity, a second cavity, an inflation port, and an overflow vent. A piston is provided in the first cavity, and the piston is flush with the valve stem. The movement of the piston in the first cavity is used to push the valve stem. The second cavity is connected to the first cavity and is connected to both the inflation port and the overflow vent. The inflation port is connected to the air inlet. A sealing seat and a control rod are respectively installed in the second cavity. The sealing seat is installed at the connection between the second cavity and the overflow vent. One end of the control rod contacts a cam, and the other end can be inserted into the sealing seat. When the sealing seat is inserted, the second cavity is not connected to the overflow vent. A return spring is installed between the control rod and the sealing seat.

[0017] With the above technical solution, the inflation port is connected to the air inlet port, continuously inflating the second chamber. When the cam rotates to the far repose angle, the control rod is pushed to the other end and inserted into the sealing seat. At this time, the second chamber is not connected to the overflow vent, and the air pressure in the second chamber increases, pushing the piston to move towards the valve stem in the first chamber, thereby pushing the valve stem to move. When the cam rotates to near the repose angle, the control rod is pulled out of the sealing seat under the action of the return spring. At this time, the second chamber is connected to the overflow vent, and the gas in the second chamber is discharged from the overflow vent, causing the air pressure in the second chamber to decrease.

[0018] Preferably, a third sealing element is installed on the sealing seat, and the third sealing element is in close contact with the control rod when the control rod is inserted into the sealing seat.

[0019] The above technical solution improves the sealing performance between the control rod and the sealing seat when the control rod is inserted into the sealing seat.

[0020] Preferably, the piston is provided with a "Y"-shaped seal, with the opening of the Y-shape facing away from the valve body.

[0021] The above technical solutions improve the sealing performance during piston movement.

[0022] Preferably, the triggering pilot device is provided with a small end cap, which is used to fix the control rod in the second cavity. One end of the control rod passes through the small end cap and contacts the cam. The small end cap is threadedly connected to the cavity wall of the second cavity.

[0023] The above technical solution facilitates the assembly and disassembly of the sealing seat, return spring, and control rod within the second cavity.

[0024] Preferably, a fourth sealing element is provided between the small end cap and the cavity wall of the second cavity, and a fifth sealing element is provided between the small end cap and the control rod.

[0025] The above technical solution increases the sealing between the small end cap and the cavity wall of the second cavity, as well as the sealing between the small end cap and the control rod.

[0026] Preferably, the cam is threadedly connected to the camshaft core, and a nut is threadedly connected to the camshaft core on the outer side of the cam.

[0027] The above-mentioned protection measures increase the stability of the cam installation.

[0028] An automatic pneumatic drainage device includes a sealed tank, a water outlet pipe, an air inlet pipe, an exhaust pipe, an overflow exhaust pipe, a connecting rod, and a float. The sealed tank is equipped with the aforementioned automatic drainage pneumatic control valve. The sealed tank has a water inlet with a one-way valve. The water inlet is located on the side wall of the sealed tank near the bottom. The water outlet pipe extends into the sealed tank, with its end near the water inlet. The air inlet pipe is connected to the air inlet of the automatic drainage pneumatic control valve. The exhaust pipe is connected to the vent of the automatic drainage pneumatic control valve. The overflow exhaust pipe is connected to the overflow exhaust port. The camshaft is connected to the connecting rod, the connecting rod is connected to the float, and the air inlet pipe is connected to an external air source.

[0029] The above technical solutions make the automatic drainage device simpler in structure and easier to install and maintain.

[0030] Compared with the prior art, this utility model has the following technical effects:

[0031] Simply rotate the camshaft core so that when one of the cams is at its far repose angle, the cam pushes the control lever of the trigger pilot device, causing the control valve rod of the trigger pilot device to move to the first position, thereby connecting the air inlet and the working hole to achieve inflation; when the camshaft core rotates back to the far repose angle, the other cam pushes the control lever of the other trigger pilot device, causing the control valve rod of the other trigger pilot device to move to the second position, thereby connecting the air outlet and the working hole to achieve deflation, making the structure of the automatic drain air control valve simpler and easier to install. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0033] Figure 1 This is a schematic diagram of an automatic drainage pneumatic control valve.

[0034] Figure 2 This is a front view of an automatic drain pneumatic control valve.

[0035] Figure 3 A bottom view of an automatic drain pneumatic control valve;

[0036] Figure 4 for Figure 3 AA section view;

[0037] Figure 5 This is a schematic diagram of a pneumatically controlled automatic drainage device.

[0038] Figure 6 This is a top view of a pneumatically controlled automatic drainage device.

[0039] Valve body 1, air inlet 2, air vent 3, working hole 4, valve stem 5, trigger pilot device 6, control rod 61, first chamber 62, second chamber 63, air filling hole 64, overflow vent 65, piston 66, sealing seat 67, return spring 68, camshaft core 7, nut 71, cam 8, first seal 91, second seal 92, "Y" shaped seal 93, third seal 94, fourth seal 95, fifth seal 96, sealing tank 101, water outlet pipe 102, air inlet pipe 103, exhaust pipe 104, overflow vent pipe 105, connecting rod 106, float ball 107, automatic drain pneumatic control valve 108, water inlet 109. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0041] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0042] Example 1

[0043] like Figure 1-4 As shown, an automatic drain pneumatic control valve includes a valve body 1. The valve body 1 is provided with an air inlet 2, an air vent 3, a working hole 4, a valve stem 5, and a trigger pilot device 6. The air inlet 1 is used to connect to an external air inlet pipe; the air vent 2 is used to connect to an external air vent pipe; the working hole is used to connect to the mounting cavity of the automatic drain pneumatic control valve; the valve stem 5 can slide within the valve body 1, allowing it to be in a first position or a second position within the valve body 1. In the first position, the air inlet and the working hole are connected; in the second position, the air vent and the working hole are connected. A first sealing element 91 is provided between the valve stem 5 and the valve body 1. In this embodiment, the first sealing element 91 is a C-shaped sealing ring. A second seal 92 is provided between the valve body 5 and the trigger pilot device 6. In this embodiment, a C-shaped sealing ring is used; in this embodiment, an O-shaped sealing ring is used.

[0044] Two trigger pilot devices 6 are respectively located at both ends of the valve body 1. One device pushes the valve stem 5 from the first position to the second position, and the other device pushes the valve stem 5 from the second position to the first position. A cam shaft core 7 is mounted between the two trigger pilot devices 6. Two cams 8 are mounted on the cam shaft core, and the two cams have different far-repose angles. Each cam contacts a control rod 61 on one of the trigger pilot devices 6. The cams 8 are threadedly connected to the cam shaft core 7, and a nut 71 is threadedly connected to the cam shaft core 7 on the outer side of the cam 8.

[0045] The triggering pilot device 6 is provided with a first cavity 62, a second cavity 63, an air inlet 64 and an overflow vent 65. A piston 66 is provided in the first cavity. The piston 66 is flush with the valve stem 5. The movement of the piston 66 in the first cavity 62 is used to push the valve stem 5. A "Y" shaped seal 93 is provided on the piston 66. The opening of the Y shape faces away from the valve body. The second cavity 63 is connected to the first cavity 62. The second cavity 63 is also connected to an inflation port 64 and an overflow vent port 65. The inflation port 64 is connected to the air inlet 2. A sealing seat 67 and a control rod 61 are installed inside the second cavity 63. The sealing seat 67 is installed at the point where the second cavity 63 connects to the overflow vent port 65. One end of the control rod 61 contacts the cam 8, and the other end can be inserted into the sealing seat 67. When the sealing seat 67 is inserted, the second cavity 63 is not connected to the overflow vent port 64. A third sealing element 94 is installed on the sealing seat 67. When the control rod 61 is inserted into the sealing seat 67, the third sealing element 94 is in close contact with the control rod 61. A return spring 68 is installed between the control rod 61 and the sealing seat 67.

[0046] The triggering pilot device 6 is provided with a small end cap 69, which is used to fix the control rod 61 inside the second cavity 63. One end of the control rod 61 passes through the small end cap 69 and contacts the cam 8. The small end cap 69 is threadedly connected to the cavity wall of the second cavity 63. A fourth sealing element 95 is provided between the small end cap 69 and the cavity wall of the second cavity 63, and a fifth sealing element 96 is provided between the small end cap 69 and the control rod 61.

[0047] like Figure 5-6As shown, a pneumatically controlled automatic drainage device includes a sealed tank 101, a water outlet pipe 102, an air inlet pipe 103, an exhaust pipe 104, an overflow exhaust pipe 105, a connecting rod 106, and a float 107. The aforementioned automatic drainage pneumatic control valve 108 is installed inside the sealed tank 101. The sealed tank 101 is provided with a water inlet 109, and a one-way valve 110 is installed at the water inlet 109. The water inlet 109 is located on the side wall of the sealed tank 101 near the bottom. The water outlet pipe 102 extends into the sealed tank 101, with its end near the water inlet 109. The air inlet pipe 103 is connected to the air inlet 2 of the automatic drainage pneumatic control valve 108, the exhaust pipe 104 is connected to the vent 3 of the automatic drainage pneumatic control valve 108, and the overflow exhaust pipe 105 is connected to the overflow exhaust port 65. Camshaft core 7 is connected to connecting rod 106, connecting rod 106 is connected to float ball 107, and intake pipe is connected to external high-pressure air source.

[0048] As the water level in the sealed tank 101 rises, the float rises, causing the camshaft core 7 to rotate. At the same time, the cam 8 presses down the control rod 61 to insert into the sealing seat. When the water level reaches its highest point, the second chamber is sealed. Under the action of the high-pressure gas provided by the air inlet pipe, the piston is pushed towards the valve body, and the valve rod is pushed to the first position. At this time, the air inlet and the working hole are connected, and air is injected into the sealed tank 101. Under the action of the high-pressure air source, the water in the sealed tank 101 is forced out through the water outlet pipe.

[0049] As water is gradually forced out of the sealed tank 101, the water level drops, causing the float to descend. The float drives the camshaft core 7 to rotate via a connecting rod. When the water level drops to the lowest level, another cam presses down, inserting another control rod into the sealing seat, sealing the second chamber. Under the action of high-pressure gas provided by the air inlet pipe, the piston moves towards the valve body, pushing the valve stem to the second position. At this time, the air outlet connects with the working hole, venting gas out of the sealed tank. When the air pressure inside the sealed tank 101 is less than the water pressure outside the sealed tank 101, the one-way valve at the inlet opens, allowing water to enter the sealed tank. The water level rises, and the above actions are repeated to complete the automatic drainage.

[0050] 1. It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automatic drain pneumatic control valve, characterized in that, The valve body includes an air inlet, an air vent, a working hole, a valve stem, and a trigger pilot device. The air inlet is used to connect to an external air inlet pipe; The vent hole is used to connect to an external vent pipe; The working hole is used to connect to the mounting cavity of the automatic drain pneumatic control valve; The valve stem can slide within the valve body, allowing it to be in a first position or a second position within the valve body. When in the first position, the air inlet is connected to the working hole, and when in the second position, the air outlet is connected to the working hole. The trigger pilot device consists of two devices, each located at one end of the valve body. One device is used to push the valve stem from the first position to the second position, and the other device is used to push the valve stem from the second position to the first position. A cam shaft is mounted between the two trigger pilot devices. The cam shaft has two cams with different far-repose angles. Each cam contacts the control rod on one of the trigger pilot devices.

2. The automatic drainage pneumatic control valve according to claim 1, characterized in that, A first sealing element is provided between the valve stem and the valve body, and a second sealing element is provided between the valve body and the trigger pilot device.

3. The automatic drain pneumatic control valve according to claim 1, characterized in that, The triggering pilot device is provided with a first cavity, a second cavity, an inflation port, and an overflow vent. A piston is installed in the first cavity, and the piston is flush with the valve stem. The movement of the piston in the first cavity is used to push the valve stem. The second cavity is connected to the first cavity and is connected to both the inflation port and the overflow vent. The inflation port is connected to the air inlet. A sealing seat and a control rod are installed in the second cavity. The sealing seat is installed at the connection between the second cavity and the overflow vent. One end of the control rod contacts a cam, and the other end can be inserted into the sealing seat. When the sealing seat is inserted, the second cavity is not connected to the overflow vent. A return spring is installed between the control rod and the sealing seat. The second cavity is connected to an external air source.

4. The automatic drain pneumatic control valve according to claim 3, characterized in that, A third sealing element is installed on the sealing seat, and when the control rod is inserted into the sealing seat, the third sealing element is in close contact with the control rod.

5. The automatic drain pneumatic control valve according to claim 3, characterized in that, The piston is equipped with a "Y"-shaped seal, with the opening of the Y-shape facing away from the valve body.

6. The automatic drain pneumatic control valve according to claim 3, characterized in that, The triggering pilot device is provided with a small end cap, which is used to fix the control rod in the second cavity. One end of the control rod passes through the small end cap and contacts the cam. The small end cap is threadedly connected to the cavity wall of the second cavity.

7. The automatic drain pneumatic control valve according to claim 6, characterized in that, A fourth sealing element is provided between the small end cap and the cavity wall of the second cavity, and a fifth sealing element is provided between the small end cap and the control rod.

8. The automatic drainage pneumatic control valve according to claim 3, characterized in that, The cam is threadedly connected to the camshaft core, and a nut is threadedly connected to the camshaft core on the outer side of the cam.

9. A pneumatically controlled automatic drainage device, characterized in that, The device includes a sealed tank, a water outlet pipe, an air inlet pipe, an exhaust pipe, an overflow exhaust pipe, a connecting rod, and a float. The sealed tank is equipped with an automatic drainage pneumatic control valve as described in any one of claims 1-8. The sealed tank has a water inlet with a one-way valve at the inlet. The water inlet is located on the side wall of the sealed tank near the bottom. The water outlet pipe extends into the sealed tank, with its end near the water inlet. The air inlet pipe is connected to the air inlet of the automatic drainage pneumatic control valve. The exhaust pipe is connected to the vent of the automatic drainage pneumatic control valve. The overflow exhaust pipe is connected to the overflow exhaust port. The camshaft is connected to the connecting rod, the connecting rod is connected to the float, and the air inlet pipe is connected to an external air source.

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