Self-operated regulating valve capable of preventing valve rod from being abraded

Abstract

The self-operated regulating valve comprises a valve body and a connecting cover, the connecting cover is installed on the upper wall of the valve body, the valve rod is installed in the middle of the connecting cover in an inserted mode, a through hole is formed in the upper wall of the connecting cover, a sealing ring is installed on the inner wall of the through hole, an oil channel is formed in the valve rod, and an oil inlet hole and an oil outlet hole are formed in the side wall of the valve rod. A piston block is installed at the end, located in the connecting cover, of the valve rod, a storage groove is formed in the inner wall of the connecting cover, and the piston block is attached to the side wall of the storage groove. In addition, the storage groove can store grease, then redundant grease is extruded into the connecting cover through the piston block by moving the valve rod, and the piston block can prevent the grease from entering the valve body and being mixed with fluid in the valve body.

Description

Technical Field

[0001] This patent relates to the technical field of regulating valves, specifically a self-operated regulating valve that prevents valve stem wear. Background Art

[0002] Self-operated regulating valve, also known as self-operated control valve, is a regulating valve that relies on the pressure and temperature of the medium flowing through the valve as energy to drive the valve to work automatically, and does not require external power supply and secondary instrumentation;

[0003] Because the self-operated regulating valve needs to adjust the water flow by the up and down movement of the valve stem, the valve stem in the regulating valve is prone to wear, affecting its use;

[0004] Therefore, a self-operated regulating valve with a lubrication structure to prevent valve stem wear is needed to solve the above-mentioned problems.

[0005] Patent content

[0006] The purpose of this patent is to provide a self-operated regulating valve that prevents valve stem wear, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, this patent provides the following technical solutions: a self-operated regulating valve for preventing valve stem wear, comprising a valve body and a connecting cover, wherein the connecting cover is installed on the upper wall of the valve body, a valve stem is inserted and installed in the middle of the connecting cover, and the valve stem is inserted into the valve body and connected to the internal valve core;

[0008] A through hole is formed on the upper wall of the connection cover, the valve stem is inserted into the through hole, a sealing ring is installed on the inner wall of the through hole, and the sealing ring is sleeved on the outside of the valve stem;

[0009] An oil passage is provided inside the valve stem, and an oil inlet hole and an oil outlet hole are provided on the side wall of the valve stem, both of which are connected to the oil passage. A piston block is installed on one end of the valve stem located inside the connecting cover, and a storage groove is provided on the inner wall of the connecting cover, which is connected to the through hole, and the piston block is in contact with the side wall of the storage groove.

[0010] Preferably, an oil drain hole is provided on the upper wall of the connecting cover, the oil drain hole is communicated with the storage tank, and a blocking block is inserted and installed in the oil drain hole.

[0011] Preferably, a sealing gasket is installed on the outer side of one end of the valve stem located inside the connecting cover, and the sealing gasket is closely connected to the inner wall of the connecting cover.

[0012] Preferably, a support frame is installed on the upper wall of the connecting cover, a driving assembly is installed on the upper wall of the support frame, the valve stem is connected to the driving assembly, a fixing ring is installed on the side wall of the valve stem, a spring is sleeved on the outside of the valve stem, the upper wall of the spring is fitted with the fixing ring, and the lower wall of the spring is fitted with the upper wall of the connecting cover.

[0013] Preferably, the block includes a rubber stopper, a connecting belt and a convex ring, the outer side of the rubber stopper is provided with a convex ring, there are two convex rings in total, one end of the connecting belt is provided on the upper wall of the rubber stopper, and the other end of the connecting belt is provided on the upper wall of the connecting cover.

[0014] Preferably, a sealing ring is fitted on the inner wall of the connection cover, and the sealing ring is fitted and connected to the side wall of the sealing gasket.

[0015] Compared with the prior art, the beneficial effects of this patent are:

[0016] The device is provided with an oil inlet hole, an oil channel and an oil outlet hole on the valve stem, so as to lubricate the valve stem and reduce the friction force generated by the valve stem during movement, thereby achieving the purpose of slowing down the wear of the valve stem;

[0017] In addition, the storage tank can store grease, and then through the movement of the valve stem, the excess grease is squeezed out of the connecting cover through the piston block, and the piston block can prevent the grease from entering the valve body and mixing with the fluid in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of this patent.

[0019] Figure 2 This is a schematic diagram of the connection cover structure of this patent.

[0020] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle.

[0021] In the figure: 1 valve body, 2 connecting cover, 3 valve stem, 4 through hole, 5 sealing ring, 6 oil channel, 7 oil inlet hole, 8 oil outlet hole, 9 piston block, 10 storage tank, 11 oil drain hole, 12 blocking block, 121 rubber plug, 122 connecting belt, 123 convex ring, 13 sealing gasket, 14 support frame, 15 driving assembly, 16 fixing ring, 17 spring, 18 sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the described embodiments are only part of the embodiments of this patent, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] See also Figure 1-3 This patent provides a technical solution: a self-operated regulating valve to prevent valve stem wear, comprising a valve body 1 and a connecting cover 2, the connecting cover 2 is installed on the upper wall of the valve body 1, a valve stem 3 is inserted and installed in the middle of the connecting cover 2, and the valve stem 3 is inserted into the valve body 1 and connected to the internal valve core;

[0024] The valve stem 3 is driven up and down by the driving assembly 15, so that the valve stem 3 controls the opening and closing of the flow channel inside the valve body 1 through the valve core;

[0025] A through hole 4 is formed on the upper wall of the connection cover 2, and the valve stem 3 is inserted into the through hole 4. A sealing ring 5 is installed on the inner wall of the through hole 4, and the sealing ring 5 is sleeved on the outside of the valve stem 3.

[0026] Because the valve stem 3 needs to move up and down continuously, in order to avoid excessive wear of the valve stem 3 and affect the sealing performance of the device, the device is provided with an oil inlet hole 7, an oil passage 6 and an oil outlet hole 8 on the valve stem 3, so that the valve stem 3 can be lubricated, so as to reduce the friction force generated by the valve stem 3 during movement, thereby achieving the purpose of slowing down the wear of the valve stem 3;

[0027] An oil passage 6 is provided inside the valve stem 3, an oil inlet hole 7 and an oil outlet hole 8 are provided on the side wall of the valve stem 3, both of which are connected to the oil passage 6, a piston block 9 is installed at one end of the valve stem 3 located inside the connecting cover 2, a storage groove 10 is provided on the inner wall of the connecting cover 2, the storage groove 10 is connected to the through hole 4, and the piston block 9 is in contact with the side wall of the storage groove 10;

[0028] When lubricating the valve stem 3, some excess grease will enter the storage groove 10 in the connection cover 2. Due to the obstruction of the piston block 9, the grease can be prevented from entering the valve body 1 and dissolving the fluid in the valve body flow channel, causing the fluid to be contaminated.

[0029] When the valve stem 3 moves, the piston block 9 also moves along with the valve stem 3 , so that the piston block 9 squeezes out the grease in the storage tank 10 through the oil discharge hole 11 .

[0030] Specifically, an oil drain hole 11 is formed on the upper wall of the connection cover 2, the oil drain hole 11 is communicated with the storage tank 10, and a blocking block 12 is inserted and installed in the oil drain hole 11;

[0031] The block 12 can block the oil drain hole 11 .

[0032] Specifically, a sealing gasket 13 is installed on the outer side of one end of the valve stem 3 located inside the connecting cover 2, and the sealing gasket 13 is closely connected to the inner wall of the connecting cover 2;

[0033] The sealing gasket 13 can further separate the grease from the fluid to prevent the grease from contacting the fluid.

[0034] Specifically, a support frame 14 is installed on the upper wall of the connection cover 2, a driving assembly 15 is installed on the upper wall of the support frame 14, the valve stem 3 is connected to the driving assembly 15, a fixing ring 16 is installed on the side wall of the valve stem 3, a spring 17 is sleeved on the outside of the valve stem 3, the upper wall of the spring 17 is in contact with the fixing ring 16, and the lower wall of the spring 17 is in contact with the upper wall of the connection cover 2;

[0035] The driving assembly 15 proposed in this article includes a diaphragm chamber, a pressure-inducing pipe, and a condenser. When working, the pressure-inducing pipe can input the pressure behind the valve into the inner side of the diaphragm chamber, and the diaphragm chamber will push the diaphragm located inside the diaphragm chamber, thereby driving the valve stem 3 to move up and down, thereby changing the valve core opening, and achieving the purpose of regulating the pressure behind the valve. By installing the condenser above the diaphragm chamber and passing the pressure-inducing pipe above the condenser, it is ensured that the refrigerant entering the diaphragm chamber is the refrigerant, so as not to damage the diaphragm.

[0036] The driving assembly 15 in this article is consistent with the driving structure of a self-operated regulating valve proposed in the publication number CN212318894U. The specific working principle can be referred to the above document.

[0037] Specifically, the block 12 includes a rubber plug 121, a connecting belt 122 and a convex ring 123. The outer side of the rubber plug 121 is provided with a convex ring 123, and there are two convex rings 123. One end of the connecting belt 122 is provided on the upper wall of the rubber plug 121, and the other end of the connecting belt 122 is provided on the upper wall of the connecting cover 2.

[0038] The connection belt 122 can prevent the block 12 from being lost, and the convex ring 123 can prevent the rubber plug 121 from being poorly sealed.

[0039] Specifically, a sealing ring 18 is fitted on the inner wall of the connection cover 2, and the sealing ring 18 is fitted and connected to the side wall of the sealing gasket 13;

[0040] The side wall of the sealing ring 18 is provided with an adhesive layer, the outer ring of the sealing ring 18 is attached to the inner side of the connecting cover 2, and the inner ring of the sealing ring 18 is attached to the sealing gasket 13, so as to ensure the sealing of the connection between the sealing gasket 13 and the connecting cover 2 and avoid contact between grease and fluid.

[0041] Working principle: Before using this device, the staff injects the lubricating oil into the oil channel 6 through the oil inlet hole 7 by means of a syringe, and then starts the device. When the valve stem 3 moves up and down driven by the driving assembly 15, the lubricating oil in the oil channel 6 will move downward under the factor of gravity and flow out through the oil outlet hole 8, so as to lubricate the valve stem 3 and reduce the friction force generated by the valve stem 3 during movement. Excess grease will enter the storage tank 10, and then be squeezed out of the oil discharge hole 11 by the extrusion of the piston block 9.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A self-operated regulating valve for preventing valve stem wear, comprising a valve body (1) and a connecting cover (2), characterized in that: A connecting cover (2) is installed on the upper wall of the valve body (1), a valve stem (3) is inserted and installed in the middle of the connecting cover (2), and the valve stem (3) is inserted into the valve body (1) and connected to the internal valve core; The upper wall of the connection cover (2) is provided with a through hole (4), the valve stem (3) is inserted into the through hole (4), a sealing ring (5) is installed on the inner wall of the through hole (4), and the sealing ring (5) is sleeved on the outside of the valve stem (3); An oil passage (6) is provided inside the valve stem (3), and an oil inlet hole (7) and an oil outlet hole (8) are provided on the side wall of the valve stem (3), and the oil inlet hole (7) and the oil outlet hole (8) are both connected to the oil passage (6). A piston block (9) is installed at one end of the valve stem (3) located inside the connecting cover (2), and a storage groove (10) is provided on the inner wall of the connecting cover (2), and the storage groove (10) is connected to the through hole (4), and the piston block (9) is in contact with the side wall of the storage groove (10).

2. A self-operated regulating valve for preventing valve stem wear according to claim 1, characterized in that: An oil drain hole (11) is provided on the upper wall of the connection cover (2), the oil drain hole (11) is communicated with the storage tank (10), and a blocking block (12) is inserted and installed in the oil drain hole (11).

3. A self-operated regulating valve for preventing valve stem wear according to claim 1, characterized in that: A sealing gasket (13) is installed on the outer side of one end of the valve stem (3) located inside the connecting cover (2), and the sealing gasket (13) is closely connected to the inner wall of the connecting cover (2).

4. A self-operated regulating valve for preventing valve stem wear according to claim 1, characterized in that: A support frame (14) is installed on the upper wall of the connecting cover (2), a driving assembly (15) is installed on the upper wall of the support frame (14), the valve stem (3) is connected to the driving assembly (15), a fixing ring (16) is installed on the side wall of the valve stem (3), a spring (17) is sleeved on the outside of the valve stem (3), the upper wall of the spring (17) is in contact with the fixing ring (16), and the lower wall of the spring (17) is in contact with the upper wall of the connecting cover (2).

5. The self-operated regulating valve for preventing valve stem wear according to claim 2, characterized in that: The blocking block (12) comprises a rubber stopper (121), a connecting belt (122) and a convex ring (123); the convex ring (123) is installed on the outside of the rubber stopper (121); there are two convex rings (123); one end of the connecting belt (122) is installed on the upper wall of the rubber stopper (121); and the other end of the connecting belt (122) is installed on the upper wall of the connecting cover (2).

6. A self-operated regulating valve for preventing valve stem wear according to claim 3, characterized in that: A sealing ring (18) is fitted on the inner wall of the connection cover (2), and the sealing ring (18) is fitted and connected to the side wall of the sealing gasket (13).

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