Pneumatic balance valve

Abstract

The invention discloses a pneumatic type balance valve which comprises a valve body, a valve element, an air inlet device, a limiting piece and a locking mechanism. The valve body is of a three-way structure, one port is formed in the side face to serve as an air inlet channel, and the other two ports are coaxially formed in the vertical direction to serve as water inlet channels. The valve element is arranged in the air inlet channel, the air inlet device is arranged at the opening end of the air inlet channel, the front end of the valve element is limited by the locking mechanism in the initial state, and the rear end of the valve element is limited by the air inlet device. A water inlet of the water inlet channel is provided with a sealing ring, the sealing ring seals the water inlet through a limiting piece, and the limiting piece is limited by the valve element. The air inlet device is connected with an external air source, the air inlet device is ventilated to push the valve element to move forwards until overcoming the pre-tightening force provided by the locking mechanism, the limiting piece is unlocked after the valve element moves in place, at the moment, water pressure at the two ends of the water inlet channel is balanced, and the valve element is limited again through the locking mechanism. Water pressure at the bottom of the valve body and water pressure at the water inlet can be balanced.

Description

Technical Field

[0001] The invention relates to the technical field of underwater unmanned equipment, and in particular to a pneumatic balancing valve. Background Art

[0002] At present, conventional balancing valve devices such as Figure 1 As shown in the figure, when the water pressure of the left interface reaches a certain value and the pressure on the valve core is greater than the critical value of the spring force, the spring will be compressed and the left and right channels of the valve body will open. When the water pressure of the left interface is less than the critical value of the spring force, the valve body will close to achieve dynamic balance adjustment, so that the water pressure of the left interface is always kept near the critical value of the spring force.

[0003] The above device is dynamically controlled by a spring and cannot achieve artificial automatic control; the device can only control the pressure at one end (the left side) to a constant value (critical value) and cannot achieve water pressure balance at both ends; the above device has a specific water depth limit for use. When the pressure at the left end is much greater than the critical value of the spring, this 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, which can balance the water pressure at the bottom of the valve body and the water pressure at the water inlet.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A pneumatic balancing valve comprises a valve body, a valve core, an air intake device, a limiter and a locking mechanism;

[0007] The valve body is a three-way structure, with one port arranged on the side as an air inlet channel, and the other two ports coaxially arranged in the vertical direction as a water inlet channel; the valve core is arranged in the air inlet channel, and the air inlet device is arranged at the open end of the air inlet channel. In the initial state, the front end of the valve core is limited by the locking mechanism, and the rear end of the valve core is limited by the air inlet device; a sealing ring is provided at the water inlet of the water inlet channel, and the sealing ring seals the water inlet through a limiting member, and the limiting member is limited by the valve core; the air inlet device is connected to an external air source, and the air inlet device ventilates and 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 place, the limiting member is unlocked, and 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 limit washer, a disc spring, a support rod and a steel ball I;

[0009] The steel ball I, the support rod, the disc spring, the limit washer, and the screw plug I are arranged in sequence 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 for the steel ball I.

[0010] The front end of the valve core is truncated cone-shaped, with the small end facing the closed end of the air inlet channel. In the locked state, the steel ball I contacts the inclined surface of the valve core; a groove is provided on the valve core, and when the valve core moves into place, the steel ball I is limited in the groove; the groove transitions to the arc of the large end of the truncated cone.

[0011] Furthermore, the air intake device comprises a screw plug II, a sealing ring and a retaining ring; an air intake device mounting groove is provided at the opening end of the air intake passage;

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

[0013] Furthermore, the limiting member is a steel ball II, and a limiting groove is provided on the valve core. After the valve core moves into place, 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 truncated cone section, with the large end of the cone facing downward.

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

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

[0017] Beneficial effects:

[0018] 1. The present invention can fully achieve pressure balance on both sides, and after the balancing valve is opened, the pressure on both sides of the water inlet and the bottom of the valve body are completely equal;

[0019] The opening timing of the balancing valve can be controlled manually or by controlling the timing of ventilation through a program (the air intake device can be controlled to connect to an external air source for ventilation), thereby controlling the opening of the balancing valve, and the external environment does not affect the opening and closing states of the balancing valve. Moreover, since the present invention controls the opening of the balancing valve by connecting the air inlet to an external air source, changes in the external pressure (water pressure at the water inlet hole) have almost no effect on the opening pressure (ventilation air pressure) of the balancing valve, and the 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 meet different usage requirements.

[0021] 3. The water inlet channel where the steel ball II of the present invention is initially located is a truncated cone section with the large end facing downward, so that the steel ball II is not easily stuck when it falls.

[0022] 4. The valve core of the present invention is a stepped shaft, and the air inlet passage where the valve core is located is also in the shape of a stepped shaft, so that the valve core is limited by the step surface when it moves into position, and can achieve double limiting together with the locking mechanism, thereby improving the reliability of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0027] Figure 5 It is a schematic diagram of the valve body structure of the present invention, which includes a sectional view, a left view, and a top view.

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

[0029] Among them, 1- screw plug Ⅰ, 2- limit 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- screw plug Ⅱ, 12- sealing ring Ⅲ, 13- retaining ring. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0031] The present invention provides a pneumatic balancing valve, comprising a valve body 6, a valve core 9, an air intake device, a limiter and a locking mechanism.

[0032] like Figure 2 , Figure 5 As shown, the valve body 6 is a three-way structure, one port is arranged on the side as an air inlet channel, and the other two ports are coaxially arranged in the vertical direction as a water inlet channel; the valve core 9 is arranged in the air inlet channel, and a sealing ring Ⅱ10 is provided between the outer circumference of the rear end of the valve core 9 and the water inlet channel, and the air inlet device is arranged 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 inlet device; a sealing ring Ⅰ7 is provided at the water inlet of the water inlet channel, and the sealing ring Ⅰ7 seals the water inlet through a limiting member, and the limiting member is limited by the valve core 9; the air inlet device is connected to an external air source, and the air inlet device ventilates and pushes the valve core 9 until it overcomes the preload force provided by the locking mechanism and moves forward. After the valve core 9 moves into place, the limiting member is unlocked. 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 limit washer 2, a disc spring 3, a support rod 4 and a steel ball Ⅰ5; the steel ball Ⅰ5, the support rod 4, the disc spring 3, the limit washer 2, and the screw plug Ⅰ1 are arranged in sequence 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 column is provided in the screw plug Ⅰ1; the function of the steel ball Ⅰ5 is to limit the leftward movement of the valve core 9, and the disc spring 3 provides a preload force for the steel ball Ⅰ5; Figure 4 As shown, the front end of the valve core 9 is truncated cone-shaped, with the small end facing the closed end of the air inlet channel. In the locked state, the steel ball Ⅰ5 is in conflict with the inclined surface of the valve core 9; a groove is provided on the valve core 9, and the valve core 9 moves into place, and the steel ball Ⅰ5 is limited in the groove; the groove transitions to the arc of the large end of the truncated cone.

[0034] The opening end of the air inlet passage is provided with an air inlet device installation groove. The air inlet device includes a screw plug II 11, a sealing ring III 12 and a retaining ring 13; the screw plug II 11 is used to inlet air and limit the position of the valve core 9. Figure 6 As shown, the outer circumference of the screw plug II 11 is provided with an annular boss, and a sealing ring III 12 is installed between the front end face of the annular boss and the wall surface of the air intake device installation groove; the rear end face of the annular boss is limited by a retaining ring 13, and the function of the retaining ring 13 is to prevent the screw plug II from slipping. An axial air inlet hole is provided inside the screw plug II 11 for connecting to an external air source.

[0035] The limiter is a steel ball II 8, and a limit groove is provided on the valve core 9. After the valve core 9 moves into position, the steel ball II 8 falls into the limit groove. In the initial state, the steel ball II 8 is located in front of the limit groove, and is abutted by the outer circumference of the front end of the valve core 9. The steel ball II 8 compresses the sealing ring I7, and the sealing ring I7 and the steel ball II 8 jointly seal the water inlet. The valve core 9 controls the steel ball II 8 to compress and release the sealing ring I7.

[0036] Preferably, the water inlet channel where the steel ball II 8 is initially located is a truncated cone section, with the large end of the cone facing downward.

[0037] The rear end of the valve core 9 is also provided with a screw hole for resetting with the help of an external tool. When resetting is required, the screw plug II 11 is removed, and the external tool is connected to the rear end of the valve core 9 to drive the valve core 9 to move backward.

[0038] As an improvement, in order to ensure the reliability of the valve core 9 moving into position, the valve core 9 is designed as a stepped shaft, the limit groove is set in the small diameter section of the valve core 9, and the sealing ring II 10 is set in the large diameter section of the valve core 9. Correspondingly, the air inlet channel where the valve core 9 is located in the valve body 6 is also in the shape of a stepped shaft, and the valve core 9 is limited by the step surface when it moves into position, and the double limit is achieved together with the above-mentioned locking mechanism.

[0039] Before the balancing valve is actuated, Figure 2 As shown, the water inlet channel is closed by the steel ball II 8 and the sealing ring I 7, and the steel ball II 8 is blocked from moving by the valve core 9 below. The steel ball I 5 locks the valve core 9 through the inclined surface.

[0040] When the balancing valve needs to be opened, the air inlet is controlled for ventilation. After the air inlet channel is opened, the high-pressure gas pushes the valve core 9 to move. The valve core 9 transmits the 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 to make way for the valve core 9. The valve core 9 moves a certain distance, and the limit groove of the valve core 9 is aligned with the position of the steel ball Ⅱ8. Figure 3 As shown, the steel ball II 8 falls into the limiting groove of the valve core 9, opening the water inlet channel, and the water at the water inlet enters the bottom of the valve body 6, achieving the purpose of balancing the water pressure at the bottom of the valve body 6 and the water pressure at the water inlet.

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

Claims

1. A pneumatic balancing valve, characterized in that: It includes a valve body, a valve core, an air intake device, a limiter and a locking mechanism; The valve body is a three-way structure, with one port arranged on the side as an air inlet channel, and the other two ports coaxially arranged in the vertical direction as a water inlet channel; the valve core is arranged in the air inlet channel, and the air inlet device is arranged at the open end of the air inlet channel. In the initial state, the front end of the valve core is limited by the locking mechanism, and the rear end of the valve core is limited by the air inlet device; a sealing ring is provided at the water inlet of the water inlet channel, and the sealing ring seals the water inlet through a limiting member, and the limiting member is limited by the valve core; the air inlet device is connected to an external air source, and the air inlet device ventilates and 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 place, the limiting member is unlocked, and the water pressure at both ends of the water inlet channel is balanced, and the valve core is limited again by the locking mechanism.

2. The pneumatic balancing valve according to claim 1, characterized in that: The locking mechanism comprises a screw plug I, a limit washer, a disc spring, a support rod and a steel ball I; The steel ball I, the support rod, the disc spring, the limit washer, and the screw plug I are arranged in sequence 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 for the steel ball I. The front end of the valve core is truncated cone-shaped, with the small end facing the closed end of the air inlet channel. In the locked state, the steel ball I contacts the inclined surface of the valve core; a groove is provided on the valve core, and when the valve core moves into place, the steel ball I is limited in the groove; the groove transitions to the arc of the large end of the truncated cone.

3. The pneumatic balancing valve according to claim 1, characterized in that: The air intake device comprises a screw plug II, a sealing ring and a retaining ring; an air intake device mounting groove is provided at the opening end of the air intake channel; An annular boss is provided on the outer circumference of the screw plug II, and a sealing ring is installed between the front end surface of the annular boss and the wall surface of the air intake device mounting groove; the rear end surface of the annular boss is limited by a retaining ring; an axial air intake hole is provided in the screw plug II.

4. The pneumatic balancing valve according to claim 1, characterized in that: The limiting member is a steel ball II, and a limiting groove is provided on the valve core. After the valve core moves into position, the steel ball II falls into the limiting groove.

5. The pneumatic balancing valve according to claim 4, characterized in that: The water inlet channel where the steel ball II is initially located is a truncated cone section, with the large end of the truncated cone facing downward.

6. The pneumatic balancing valve according to claim 4, characterized in that: The valve core is a stepped shaft, the limiting groove is arranged at the small diameter section of the valve core, and a sealing ring is arranged between the large diameter section of the valve core and the air inlet passage; the air inlet passage where the valve core is located is in the shape of a stepped shaft, and the valve core is limited by the step surface when it moves into position.

7. The pneumatic balancing valve according to any one of claims 1 to 6, characterized in that: A screw hole is provided at the rear end of the valve core for resetting with the aid of an external tool.

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