Ball valve with pressure loading and unloading grease control valve

Abstract

The utility model discloses a ball valve with pressure installation and removal grease injection control valve relates to valve maintenance technical field, including ball valve body, grease injection valve and check valve, be equipped with the valve body grease injection hole from the ball valve body outside communication to the ball valve body inside on the ball valve body, still includes the grease injection pedestal of fixed in the ball valve body outside, the grease injection channel of grease injection pedestal is equipped with with the valve body grease injection hole intercommunication, first branch hole and second branch hole, first branch hole communicates with the grease injection channel, and second branch hole communicates with the grease injection channel through first branch hole, and the cut -off valve is set up in first branch hole, and the check valve and grease injection valve set up in second branch hole. Then when the damage of grease injection control valve appears, can cut off first branch hole with grease injection hole through cut -off valve, and seal grease injection hole, thereby can replace grease injection control valve under the condition of maintaining the internal pressure of ball valve, need not interrupt the normal work of ball valve, guarantees the production work of ball valve to carry on continuously.

Description

Technical Field

[0001] This utility model relates to the field of valve maintenance technology, and in particular to a ball valve that can be pressurized and unloaded for grease injection control. Background Technology

[0002] During use, the ball and seat of a ball valve need to be cleaned and lubricated at least every six months; if... Figure 1 As shown, a grease control valve, typically composed of a grease injection valve 200 and a one-way valve 300, injects cleaning fluid or lubricating grease into the interior of the ball valve body 100 through the grease injection port 110 for routine maintenance. For example, Chinese utility model patent document CN204784945U discloses a nickel alloy ball valve end cap, the technical solution of which includes an end cap for connecting the valve body. The outer end of the end cap includes an end flange portion and a middle flange portion. The end flange portion has a grease injection port communicating with the inner cavity of the end cap. A grease injection valve is installed on the grease injection port, and a one-way valve is installed at the lower end of the grease injection valve and placed inside the grease injection port.

[0003] When the ball valve experiences internal leakage, sealing grease can be injected into the valve body 100 through the grease injection valve 200 and the check valve 300 to achieve an emergency seal. However, if the grease injection valve 200 or the check valve 300 is damaged, routine maintenance and emergency sealing of the ball valve cannot be performed. The ball valve must be stopped before the grease injection control valve can be disassembled and replaced. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a ball valve that can be installed and removed under pressure, so that the grease injection control valve can be replaced without stopping the operation of the ball valve when the grease injection control valve is damaged.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a ball valve that can be pressurized and unloaded grease injection control valve, including a ball valve body, a grease injection valve and a check valve. The ball valve body is provided with a valve body grease injection hole that connects from the outside of the ball valve body to the inside of the ball valve body. It also includes a grease injection base fixed to the outside of the ball valve body. The grease injection base is provided with a grease injection channel that communicates with the valve body grease injection hole, a first branch hole and a second branch hole. The first branch hole communicates with the grease injection channel, and the second branch hole communicates with the grease injection channel through the first branch hole. A shut-off valve is provided in the first branch hole, and the check valve and the grease injection valve are provided in the second branch hole.

[0006] As an improvement to the above solution: the shut-off valve includes a valve disc, a sealing ring, and a valve stem; the valve stem is threaded into the sealing ring, and the end of the valve stem near the grease injection channel is fixedly connected to the valve disc; rotating the valve stem can drive the valve disc to move axially within the first branch hole and form a sealing fit with the grease injection channel.

[0007] As an improvement to the above solution: the shut-off valve further includes a valve stem sealing ring, a sealing sleeve sealing ring, and a limiting ring; the valve stem sealing ring is disposed between the valve stem and the sealing sleeve, the sealing sleeve sealing ring is disposed between the sealing sleeve and the first branch hole, and the limiting ring is fixed in the sealing sleeve by screws and forms a limiting fit with the end of the valve stem that is not connected to the valve disc.

[0008] As an improvement to the above solution: a rotating groove is provided at the center of the end of the valve stem near the sealing ring.

[0009] As an improvement to the above solution: the valve disc is a conical valve disc, and the end of the grease injection channel connected to the first branch hole is provided with a conical opening, with the tips of the conical valve disc and the conical opening facing each other.

[0010] As an improvement to the above solution, the sealing ring is threadedly connected to the first branch hole.

[0011] As an improvement to the above scheme: the diameter of the grease injection channel is equal to the diameter of the grease injection hole in the valve body.

[0012] As an improvement to the above solution: the ball valve body is provided with a limiting groove coaxially arranged with the grease injection hole of the valve body, and the bottom of the grease injection base is provided with a limiting protrusion adapted to the limiting groove; the grease injection base is welded to the ball valve body.

[0013] The beneficial effects of this utility model are as follows: By adding a grease injection base to the valve body of the ball valve and setting two branch holes communicating with the grease injection hole on the grease injection base, and adding a shut-off valve to control the on / off state between the grease injection hole and the first branch hole, the grease injection valve and the check valve are installed in the second branch hole. The second branch hole must communicate with the grease injection hole through the first branch hole. Therefore, when the grease injection control valve is damaged, the shut-off valve can isolate the first branch hole from the grease injection hole and seal the grease injection hole. This allows the grease injection control valve to be replaced while maintaining the internal pressure of the ball valve, without interrupting the normal operation of the ball valve and ensuring the continuous production of the ball valve. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the grease injection structure of a ball valve in the prior art;

[0015] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0016] Figure 3 Figure 2 Enlarged cross-sectional view of the grease injection structure.

[0017] The markings in the diagram are as follows: 100-ball valve body, 110-valve body grease injection hole, 200-grease injection valve, 300-check valve, 400-grease injection base, 410-grease injection channel, 420-first branch hole, 430-second branch hole, 500-shut-off valve, 510-valve disc, 520-sealing ring, 530-valve stem, 540-valve stem sealing ring, 550-sealing ring, 560-limiting retaining ring. Detailed Implementation

[0018] To facilitate understanding of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0019] In the description of this utility model, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] like Figure 2 and Figure 3 As shown, the ball valve of this utility model, which is a pressurized and removable grease injection control valve, includes a ball valve body 100, a grease injection control valve composed of a grease injection valve 200 and a check valve 300, a grease injection base 400, and a shut-off valve 500. The grease injection valve 200 and the check valve 300 are used to inject cleaning fluid or sealing grease into the ball valve body 100. The check valve 300 ensures that the injected liquid medium can only flow unidirectionally from the outside to the inside. The shut-off valve 500 controls the grease injection channel. When the grease injection valve 200 or the check valve 300 is damaged, the grease injection channel can be closed by the shut-off valve 500, thereby allowing the grease injection control valve to be replaced while maintaining the internal pressure of the ball valve body 100. The grease injection base 400 is used to install the grease injection valve 200, the check valve 300, and the shut-off valve 500. The grease injection base 400 forms two branch channels that communicate with the grease injection hole 110 of the valve body to install the shut-off valve 500 and the grease injection control valve respectively.

[0021] Specifically, such as Figure 2 and Figure 3As shown, the grease injection base 400 is fixedly installed on the ball valve body 100 at the location where the valve body grease injection hole 110 is provided. A grease injection channel 410 is provided inside the grease injection base 400. One end of the grease injection channel 410 is connected to the valve body grease injection hole 110. Preferably, the diameter of the grease injection channel 410 is equal to the diameter of the valve body grease injection hole 110, so that the grease injection channel 410 can be completely aligned with the valve body grease injection hole 110. The other end of the grease injection channel 410 is connected to two branch holes, namely a first branch hole 420 and a second branch hole 430. The second branch hole 420 is directly connected to the grease injection channel 410, and the second branch hole 430 is indirectly connected to the grease injection channel 410 through the first branch hole 420; that is, the second branch hole 420 is directly connected to the first branch hole 420. A shut-off valve 500 is installed in the first branch hole 420, and a grease injection valve 200 and a one-way valve 300 are installed in the second branch hole 430. The shut-off valve 500 can control the connection between the first branch hole 420 and the grease injection channel 410, and can also control the connection between the second branch hole 430 and the first branch hole 420.

[0022] The shut-off valve 500 is a normally open valve. When the shut-off valve 500 is open, the first branch port 420 remains connected to the grease injection channel 410, and the second branch port 430 remains connected to the first branch port 420. At this time, cleaning fluid or sealing grease can be injected normally into the ball valve body 100 through the grease injection control valve. The liquid medium is injected into the second branch port 430 through the grease injection valve 200, and after being controlled by the one-way flow control of the check valve 300, it enters the first branch port 420, and then flows into the grease injection port 110 of the valve body through the grease injection channel 410. When the grease injection control valve needs to be replaced, the shut-off valve 500 is closed. At this time, the first branch port 420 is isolated from the grease injection channel 410, that is, the communication channel between the grease injection port 110 of the valve body and the second branch port 430 is isolated. At this time, the grease injection valve 200 or the check valve 300 can be replaced directly without affecting the normal operation of the ball valve.

[0023] Specifically, such as Figure 3As shown, the shut-off valve 500 used in this utility model includes a valve disc 510, a sealing ring 520, and a valve stem 530. The sealing ring 520 can be fixed in the first branch hole 420 by a threaded connection to facilitate the assembly and disassembly of the shut-off valve 500 as a whole. The valve stem 530 is threadedly connected to the sealing ring 520, and the end of the valve stem 530 near the grease injection channel 410 is fixedly connected to the valve disc 510 by a milled groove hanging structure. Rotating the valve stem 530 can drive the valve disc 510 to move axially within the first branch hole 420 and form a sealing fit with the grease injection channel 410, thereby isolating the first branch hole 420 from the grease injection channel 410 and achieving a seal on the grease injection hole 110 of the valve body. Furthermore, to improve the sealing effect of the shut-off valve 500 itself and its sealing fit with the first branch hole 420, this utility model also adds a valve stem sealing ring 540, a sealing sleeve sealing ring 550, and a limiting ring 560 to the shut-off valve 500. The valve stem sealing ring 540 is disposed between the valve stem 530 and the sealing sleeve 520. An annular groove is provided on the outer circumferential surface of the valve stem 530 to install the valve stem sealing ring 540. By setting the valve stem sealing ring 540, the sealing effect between the valve stem 530 and the sealing sleeve 520 is increased to prevent liquid medium from leaking from the outside of the valve stem 530. The sealing sleeve sealing ring 550 is disposed between the sealing sleeve 520 and the first branch hole 420. Between 0 and 0, an annular groove is provided on the outer circumferential surface of the sealing ring 520 to install the sealing ring 550. By setting the sealing ring 550, the sealing effect between the sealing ring 520 and the first branch hole 420 is increased to prevent liquid medium from leaking from the outside of the sealing ring 520. The limiting ring 560 is fixed in the sealing ring 520 by screws and forms a limiting fit with the end of the valve stem 530 that is not connected to the valve disc 510. By setting the limiting ring 560, the axial movement of the valve stem 530 in the sealing ring 520 is limited to ensure that the valve stem 530 cannot be disengaged from the sealing ring 520 when the valve stem 530 is rotated to put the shut-off valve 500 in the fully open state.

[0024] Furthermore, in order to facilitate the control of the rotation of the valve stem 530, the present invention provides a rotation mating groove at the center of the end of the valve stem 530 near the sealing ring 520; the rotation mating groove can be a groove of other shapes besides circular and elliptical, such as an internal hexagonal groove, so as to facilitate the rotation of the valve stem 530 by using a tool to engage the rotation mating groove.

[0025] Furthermore, the valve disc 510 used in this invention is a conical valve disc, and the end of the grease injection channel 410 that connects to the first branch hole 420 is provided with a conical opening, with the tips of the conical valve disc and the conical opening facing each other. Through the above structural limitations, the sealing effect of the valve disc 510 on the grease injection channel 410 when the shut-off valve 500 is closed can be effectively improved.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, when installing the grease injection base 400, a limiting groove can be provided on the ball valve body 100. The limiting groove is a circular groove coaxial with the grease injection hole 110 of the valve body, and a limiting protrusion adapted to the limiting groove is provided at the bottom of the grease injection base 400. During assembly, the limiting protrusion at the bottom of the grease injection base 400 is inserted into the limiting groove of the ball valve body 100 for accurate positioning, and then the grease injection base 400 is welded to the ball valve body 100.

Claims

1. A ball valve capable of pressurized loading and unloading grease injection control valve, comprising a ball valve body (100), a grease injection valve (200), and a check valve (300), wherein the ball valve body (100) is provided with a valve body grease injection port (110) communicating from the outside of the ball valve body (100) to the inside of the ball valve body (100), characterized in that: It also includes a grease injection base (400) fixed outside the ball valve body (100). The grease injection base (400) is provided with a grease injection channel (410) communicating with the grease injection hole (110) of the valve body, a first branch hole (420) and a second branch hole (430). The first branch hole (420) communicates with the grease injection channel (410), and the second branch hole (430) communicates with the grease injection channel (410) through the first branch hole (420). A shut-off valve (500) is provided in the first branch hole (420), and a one-way valve (300) and a grease injection valve (200) are provided in the second branch hole (430).

2. The ball valve with pressurized grease injection control valve as described in claim 1, characterized in that: The shut-off valve (500) includes a valve disc (510), a sealing ring (520), and a valve stem (530); the valve stem (530) is threaded into the sealing ring (520), and one end of the valve stem (530) near the grease injection channel (410) is fixedly connected to the valve disc (510); rotating the valve stem (530) can drive the valve disc (510) to move axially within the first branch hole (420) and form a sealing fit with the grease injection channel (410).

3. The ball valve with pressurized grease injection control valve as described in claim 2, characterized in that: The shut-off valve (500) also includes a valve stem sealing ring (540), a sealing sleeve sealing ring (550), and a limiting ring (560); the valve stem sealing ring (540) is disposed between the valve stem (530) and the sealing sleeve (520), the sealing sleeve sealing ring (550) is disposed between the sealing sleeve (520) and the first branch hole (420), and the limiting ring (560) is fixed in the sealing sleeve (520) by screws and forms a limiting fit with the end of the valve stem (530) that is not connected to the valve disc (510).

4. The ball valve with pressurized grease injection control valve as described in claim 3, characterized in that: The valve stem (530) has a rotating groove at the center of its end near the sealing ring (520).

5. The ball valve with pressurized grease injection control valve as described in claim 2, characterized in that: The valve disc (510) is a conical valve disc. The end of the grease injection channel (410) connected to the first branch hole (420) is provided with a conical opening. The tips of the conical valve disc and the conical opening are arranged facing each other.

6. The ball valve with pressurized grease injection control valve as described in claim 2, characterized in that: The sealing ring (520) is threadedly connected to the first branch hole (420).

7. The ball valve with pressurized grease injection control valve as described in claim 1, characterized in that: The diameter of the grease injection channel (410) is equal to the diameter of the grease injection hole (110) of the valve body.

8. The ball valve with pressurized grease injection control valve as described in claim 1, characterized in that: The ball valve body (100) is provided with a limiting groove coaxially arranged with the grease injection hole (110) of the valve body, and the bottom of the grease injection base (400) is provided with a limiting protrusion adapted to the limiting groove; the grease injection base (400) is welded to the ball valve body (100).

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