Pneumatic balance valve

Abstract

The application discloses a kind of pneumatic balance valve, including valve body, valve core, air inlet device, limiting piece and locking mechanism;Valve body is three-way structure, one port is arranged in side as air inlet channel, the remaining two ports are coaxially arranged as water inlet channel along vertical direction;Valve core is arranged in air inlet channel, air inlet device is arranged in air inlet channel opening end, initial state is described valve core front end is limited by locking mechanism, valve core rear end is limited by air inlet device;The water inlet of water inlet channel is provided with sealing ring, sealing ring is sealed by limiting piece, limiting piece is limited by valve core;Air inlet device is connected with external air source, air inlet device is ventilated and pushes valve core until the pre-tightening force provided by locking mechanism is overcome and moves forward, limiting piece is unlocked after valve core is moved in place, at this time, water pressure balance is achieved at both ends of water inlet channel, and valve core is limited by locking mechanism again.The application can balance the water pressure at the bottom of the valve body and the water pressure at the water inlet.

Description

Technical Field

[0001] This invention relates to the field of underwater unmanned equipment technology, specifically to a pneumatic balancing valve. Background Technology

[0002] Currently, conventional balancing valve devices, such as Figure 1 As shown, when the water pressure at the left port reaches a certain value, the pressure exerted on the valve core exceeds the critical value of the spring force, compressing the spring and opening the left and right channels of the valve body. When the water pressure at the left port is less than the critical value of the spring force, the valve body closes, achieving dynamic balance regulation so that the water pressure at the left port is always kept near the critical value of the spring force.

[0003] The above-mentioned device is a spring-driven dynamic control device and cannot achieve automatic control by human intervention. The device can only control the pressure at one end (left side) to a constant value (critical value) and cannot achieve water pressure balance at both ends. The above-mentioned device has specific water depth limitations. When the pressure at the left end is much greater than the critical value of the spring, the device cannot keep the pressure at the left end near the critical value, and the balancing valve fails. Summary of the Invention

[0004] In view of this, the present invention provides a pneumatic balancing valve that can balance the water pressure at the bottom of the valve body with the water pressure at the inlet.

[0005] The technical solution adopted in this invention is as follows:

[0006] A pneumatic balancing valve includes a valve body, a valve core, an air inlet device, a limiting element, and a locking mechanism;

[0007] The valve body has a three-way structure, with one port on the side serving as an air inlet channel, and the other two ports coaxially arranged vertically as water inlet channels. The valve core is located within the air inlet channel, and the air intake device is located at the opening of the air inlet channel. In the initial state, the front end of the valve core is limited by a locking mechanism, and the rear end of the valve core is limited by the air intake device. The water inlet of the water inlet channel is equipped with a sealing ring, which seals the water inlet through a limiting member, which is limited by the valve core. The air intake device is connected to an external air source. When the air intake device supplies air, it pushes the valve core until it overcomes the pre-tightening force provided by the locking mechanism and moves forward. After the valve core moves into position, the limiting member unlocks, at which point the water pressure at both ends of the water inlet channel is balanced, and the valve core is limited again by the locking mechanism.

[0008] Furthermore, the locking mechanism includes a screw plug I, a limiting washer, a disc spring, a support rod, and a steel ball I;

[0009] The steel ball I, support rod, disc spring, limiting washer, and screw plug I are arranged sequentially from top to bottom. The screw plug I is fixedly connected to the valve body and is used to adjust the preload of the disc spring. The disc spring provides preload force to the steel ball I.

[0010] The valve core has a frustum-shaped front end with the smaller end facing the closed end of the air intake channel. In the locked state, the steel ball I abuts against the inclined surface of the valve core. The valve core has a groove. When the valve core moves into place, the steel ball I is limited to the groove. The groove transitions to the larger end of the frustum with an arc.

[0011] Furthermore, the air intake device includes a screw plug II, a sealing ring, and a retaining ring; the air intake channel opening end is provided with an air intake device mounting groove;

[0012] The screw plug II has an annular boss on its outer circumference, and a sealing ring is installed between the front end face of the annular boss and the wall surface of the air intake device mounting groove; the rear end face of the annular boss is limited by a retaining ring; and the screw plug II has an axial air intake hole.

[0013] Furthermore, the limiting component is a steel ball II, and the valve core is provided with a limiting groove. After the valve core moves into position, the steel ball II falls into the limiting groove.

[0014] Furthermore, the water inlet channel where the steel ball II is initially located is a frustum section, with the larger end of the frustum facing downwards.

[0015] Furthermore, the valve core is a stepped shaft, the limiting groove is provided in the small diameter section of the valve core, and a sealing ring is provided between the large diameter section of the valve core and the air intake channel; the air intake channel where the valve core is located is a stepped shaft, and the valve core is limited by the stepped surface when it moves into place.

[0016] Furthermore, the valve core has a screw hole at its rear end for resetting with the aid of an external tool.

[0017] Beneficial effects:

[0018] 1. This invention can completely achieve pressure balance on both sides, and after the balance valve is opened, the pressure at the inlet and the bottom of the valve body are completely equal.

[0019] The opening timing of the balancing valve can be manually controlled or controlled by the timing of air supply through the control program (simply by connecting the air intake device to an external air source). This controls the opening of the balancing valve, and the external environment does not affect the opening or closing state of the balancing valve. Moreover, since this invention controls the opening of the balancing valve by connecting an external air source to the air intake, changes in external pressure (water pressure at the inlet) have almost no effect on the opening pressure (air supply pressure) of the balancing valve. Therefore, this device can be used at all depths and under different water pressure conditions.

[0020] 2. The locking mechanism of the present invention can adjust the preload of the disc spring through the screw plug I to adapt to different usage requirements.

[0021] 3. The water inlet channel where the steel ball II is initially located is a frustum section with the larger end facing down, so that the steel ball II is not easily stuck when it falls.

[0022] 4. The valve core of this invention is a stepped shaft, and the air intake channel where the valve core is located is also stepped shaft. Thus, the valve core is limited by the stepped surface when it moves into position, which can achieve double limiting together with the locking mechanism and improve the reliability of the mechanism. Attached Figure Description

[0023] Figure 1 It is a conventional balancing valve device.

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the balanced valve in the open state of the present invention.

[0026] Figure 4 This is a schematic diagram of the valve core structure of the present invention.

[0027] Figure 5 The diagrams shown are a cross-sectional view, a left view, and a top view of the valve body structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the screw plug II structure of the present invention.

[0029] Among them, 1-plug I, 2-limiting gasket, 3-disc spring, 4-support rod, 5-steel ball I, 6-valve body, 7-sealing ring I, 8-steel ball II, 9-valve core, 10-sealing ring II, 11-plug II, 12-sealing ring III, 13-retaining ring. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] The present invention provides a pneumatic balance valve, including a valve body 6, a valve core 9, an air inlet device, a limiting component and a locking mechanism.

[0032] like Figure 2 , Figure 5 As shown, the valve body 6 has a three-way structure, with one port on the side serving as an air inlet channel, and the other two ports coaxially arranged vertically as water inlet channels. The valve core 9 is located inside the air inlet channel, and a sealing ring II 10 is provided between the outer circumference of the rear end of the valve core 9 and the water inlet channel. The air intake device is located at the opening end of the air inlet channel. In the initial state, the front end of the valve core 9 is limited by the locking mechanism, and the rear end of the valve core 9 is limited by the air intake device. The water inlet of the water inlet channel is provided with a sealing ring I 7, which seals the water inlet through a limiting member, which is limited by the valve core 9. The air intake device is connected to an external air source. When the air intake device vents air, it pushes the valve core 9 until it overcomes the pre-tightening force provided by the locking mechanism and moves forward. After the valve core 9 moves into position, the limiting member unlocks. At this time, the water pressure at both ends of the water inlet channel is balanced, and the valve core 9 is limited again by the locking mechanism.

[0033] Specifically, in this embodiment, the locking mechanism includes a screw plug I1, a limiting washer 2, a disc spring 3, a support rod 4, and a steel ball I5; the steel ball I5, support rod 4, disc spring 3, limiting washer 2, and screw plug I1 are arranged sequentially from top to bottom. The screw plug I1 is fixedly connected to the valve body 6 and is used to adjust the preload of the disc spring 3. A guide post is provided inside the screw plug I1; the function of the steel ball I5 is to restrict the valve core 9 from moving to the left, and the disc spring 3 provides preload force for the steel ball I5; as Figure 4 As shown, the front end of the valve core 9 is frustum-shaped, with the small end facing the closed end of the air intake channel. In the locked state, the steel ball I5 abuts against the inclined surface of the valve core 9. The valve core 9 is provided with a groove. When the valve core 9 moves into place, the steel ball I5 is limited in the groove. The groove and the large end of the frustum are rounded.

[0034] An intake device mounting slot is provided at the opening end of the intake passage. The intake device includes a screw plug II 11, a sealing ring III 12, and a retaining ring 13; the function of the screw plug II 11 is to allow air in and restrict the position of the valve core 9, such as... Figure 6 As shown, the screw plug II11 has an annular boss on its outer circumference. A sealing ring III12 is installed between the front end face of the annular boss and the wall surface of the air intake device mounting groove. The rear end face of the annular boss is limited by a retaining ring 13, which prevents the screw plug II from slipping off. The screw plug II11 has an axial air inlet hole for connecting to an external air source.

[0035] The limiting component is steel ball II8, and the valve core 9 has a limiting groove. After the valve core 9 moves into position, steel ball II8 falls into the limiting groove. In the initial state, steel ball II8 is located in front of the limiting groove and is abutted by the outer circumference of the front end of the valve core 9. Steel ball II8 compresses sealing ring I7. Sealing ring I7 and steel ball II8 together seal the water inlet. The valve core 9 controls steel ball II8 to compress and release sealing ring I7.

[0036] Preferably, the water inlet channel where steel ball II8 is initially located is a frustum section, with the larger end of the frustum facing downwards.

[0037] The valve core 9 also has a screw hole at its rear end for resetting with the aid of an external tool. To reset, remove the screw plug II11, connect the external tool to the rear end of the valve core 9, and move the valve core 9 backward.

[0038] As an improvement, to ensure the reliability of the valve core 9's movement into position, the valve core 9 is designed as a stepped shaft. The limiting groove is located in the small diameter section of the valve core 9, and the sealing ring II 10 is located in the large diameter section of the valve core 9. Correspondingly, the air intake channel where the valve core 9 is located in the valve body 6 is also stepped shaft-shaped. The movement of the valve core 9 into position is limited by the stepped surface, achieving double limiting together with the aforementioned locking mechanism.

[0039] Before the balance valve operates, such as Figure 2 As shown, the water inlet channel is sealed by steel ball II8 and sealing ring I7, and the movement channel of steel ball II8 is blocked by the valve core 9 below. Steel ball I5 locks valve core 9 through the inclined surface.

[0040] When the balance valve needs to be opened, the air inlet is controlled to allow airflow. After the air inlet is opened, the high-pressure gas pushes the valve core 9 to move. The valve core 9 transmits force to the disc spring 3 through the steel ball I5. When the deformation of the disc spring 3 reaches the design value, the steel ball I5 moves downward, clearing the movement path for the valve core 9. The valve core 9 moves a certain distance, and the limiting groove of the valve core 9 aligns with the position of the steel ball II8. Figure 3 As shown, steel ball II8 falls into the limiting groove of valve core 9, opening the water inlet channel. Water from the inlet enters the bottom of valve body 6, achieving the purpose of balancing the water pressure at the bottom of valve body 6 with the water pressure at the inlet.

[0041] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pneumatic balancing valve, characterized in that, Includes valve body, valve core, air intake device, limit component and locking mechanism; The valve body has a three-way structure, with one port on the side serving as an air inlet channel, and the other two ports coaxially arranged vertically as water inlet channels. The valve core is located within the air inlet channel, and the air intake device is located at the opening of the air inlet channel. In the initial state, the front end of the valve core is limited by a locking mechanism, and the rear end of the valve core is limited by the air intake device. The water inlet of the water inlet channel is equipped with a sealing ring, which seals the water inlet through a limiting member, which is limited by the valve core. The air intake device is connected to an external air source. When the air intake device supplies air, it pushes the valve core until it overcomes the pre-tightening force provided by the locking mechanism and moves forward. After the valve core moves into position, the limiting member unlocks, and the water pressure at both ends of the water inlet channel is balanced. The valve core is then limited again by the locking mechanism. After the balancing valve is opened, the pressure at the water inlet and both sides of the bottom of the valve body are completely equal. The limiting component is a steel ball II, and the valve core is provided with a limiting groove. After the valve core moves into place, the steel ball II falls into the limiting groove. The valve core is a stepped shaft, and the limiting groove is provided in the small diameter section of the valve core. A sealing ring is provided between the large diameter section of the valve core and the air intake channel. The air intake channel where the valve core is located is a stepped shaft, and the valve core is limited by the stepped surface when it moves into place. The locking mechanism includes a screw plug I, a limiting washer, a disc spring, a support rod, and a steel ball I; The steel ball I, support rod, disc spring, limiting washer, and screw plug I are arranged sequentially from top to bottom. The screw plug I is fixedly connected to the valve body and is used to adjust the preload of the disc spring. The disc spring provides preload force to the steel ball I. The valve core has a frustum-shaped front end with the smaller end facing the closed end of the air intake channel. In the locked state, the steel ball I abuts against the inclined surface of the valve core. The valve core has a groove. When the valve core moves into place, the steel ball I is limited to the groove. The groove transitions to the larger end of the frustum with an arc.

2. The pneumatic balancing valve as described in claim 1, characterized in that, The air intake device includes a screw plug II, a sealing ring, and a retaining ring; the air intake channel opening end is provided with an air intake device mounting groove; The screw plug II has an annular boss on its outer circumference, and a sealing ring is installed between the front end face of the annular boss and the wall surface of the air intake device mounting groove; the rear end face of the annular boss is limited by a retaining ring; and the screw plug II has an axial air intake hole.

3. The pneumatic balance valve as described in claim 1, characterized in that, The initial water inlet channel where the steel ball II is located is a frustum section, with the larger end of the frustum facing downwards.

4. The pneumatic balancing valve as described in any one of claims 1-3, characterized in that, The valve core has a screw hole at its rear end for resetting with the aid of an external tool.

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