A stop valve

Abstract

When unclamping said control button, under the effect of the compression spring and the bubble holding vessel internal pressure that shaves, combine closely in the interior edge of valve gap and sealing load chamber, and closure is mounted on the valve core, and the support of valve core is located at 1.6mm, and closure is mounted on the valve core. The support of said valve core is located at 1.6mm, and closure is mounted on the valve core.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a stop valve. Background Art

[0002] The globe valve is the most widely used valve. Its structure includes components such as valve body, valve cover, valve stem, valve stem driving mechanism and packing. The valve body is provided with an inlet cavity and an outlet cavity, and a horizontal connecting port is provided between the inlet cavity and the outlet cavity. The valve core is installed on the valve stem and is opened or closed by the valve stem driving mechanism by vertically lifting or lowering the connecting port. However, during long-term use, the valve core of the existing globe valve is easily damaged after being flushed for a long time, thereby reducing the sealing effect between the valve core and the valve seat and causing leakage. Therefore, the valve core needs to be repaired when the valve core is damaged. When the valve core of the existing valve is repaired and replaced, the entire pipeline or equipment needs to be stopped and the globe valve needs to be removed for repair and replacement, which affects production efficiency. In addition, many working conditions do not allow the equipment to be shut down. Once the equipment is shut down, it will cause significant economic losses. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a stop valve, which can replace the valve core without stopping the machine or disassembling the valve body after one of the valve cores is damaged, and the damaged valve core can be replaced at the same time.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a stop valve, comprising: a valve body, characterized in that an inlet pipe and a outlet pipe are provided on the valve body, a valve cavity is provided on the valve body, an inspection port connected to the valve cavity is provided on the valve body, and a maintenance cover is rotatably provided on the inspection port; a sealing cavity is also provided in the valve cavity, and a valve port connected to the liquid inlet pipe and the liquid outlet pipe is provided in the sealing cavity; a valve stem is provided on the valve body, and one end of the valve stem is rotatably connected to the valve core disk within the valve body; the valve core disk is slidably connected to the sealing cavity and the connection is sealed; a plurality of vertical slots are provided on the valve core disk, a valve core is elastically connected in the vertical slots, and a switching member for controlling the rotation of the valve core disk is connected on the valve core disk; a driving mechanism connected to the valve stem is also provided in the sealing cavity, and the driving mechanism is used to drive the valve core located in the sealing cavity to slide downward along the vertical slot.

[0005] The present invention is further configured such that the sealing cavity is provided with a through groove that fits the circumference of the valve core disk, the through groove is provided with a through hole connecting the sealing cavity and the valve cavity, and one of the valve cores is provided corresponding to the driving mechanism through the through hole.

[0006] The present invention is further configured such that the driving mechanism includes a driving rod slidably arranged at the top of the sealing chamber, the driving rod passes through the sealing chamber and corresponds to the valve core located in the sealing chamber; and also includes a sleeve rotatably arranged at the top of the sealing chamber and threadedly connected to the driving rod, a gear being fixedly connected to the outside of the sleeve, and an active gear meshing with the gear being fixed on the valve stem.

[0007] The present invention is further configured such that the switching member includes a control rod rotatably arranged on the inner side of the valve stem and fixedly connected to the valve core disk at one end, a rotational connection is arranged between the control rod and the valve body, and a handle for controlling the rotation of the control rod is arranged at one end of the control rod outside the valve body.

[0008] The present invention is further configured such that the valve core is eccentrically arranged on the valve core disk, a sealing gasket is arranged between the through groove and the valve core disk, and the sealing gasket is used to seal between the through groove and the valve core disk.

[0009] The present invention is further configured such that the valve core disk is provided with a plurality of positioning grooves corresponding to the valve core, the top of the through groove is elastically connected with a positioning protrusion, and when the valve core corresponds to the driving mechanism, the positioning protrusion is clamped with the positioning groove.

[0010] The present invention is further provided with a sealing block between the inspection cover and the inspection port.

[0011] In summary, the beneficial effects of the present invention are:

[0012] 1. Compared with the prior art, the present application can switch the damaged valve core through the setting of the valve core disk and the valve core, thereby ensuring that after a valve core is damaged, the valve core can be switched without stopping the equipment, ensuring the continuous operation of the pipeline or equipment, improving the operation efficiency of the suction cylinder, and avoiding the economic losses caused by frequent shutdowns for maintenance and replacement of valve cores.

[0013] 2. Through the setting of the inspection port and inspection cover on the valve body, the valve cavity can be opened without disassembling the valve body, so that the damaged valve core can be replaced, making the replacement more convenient for the staff

[0014] 3. Compared with the prior art, the present application can block the communication between the valve port and the valve cavity by setting up a sealing cavity, and at the same time can close the through groove of the sealing cavity by the valve core disk, so that when the valve core is in an open state, the fluid only causes impact on the valve core located in the sealing cavity, while protecting the spare valve core located in the valve cavity, thereby avoiding the problem of damage to the two valve cores at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a half-section view of this embodiment.

[0016] Figure 2 It is a three-dimensional structural diagram of the sealing chamber and the valve core disk of this embodiment.

[0017] Figure 3 It is a three-dimensional structural diagram of the sealed chamber of this embodiment.

[0018] Figure 4 yes Figure 2 Side half section view.

[0019] Figure 5 yes Figure 1 Enlarged view of point A.

[0020] Figure 6 yes Figure 1 Enlarged view of point B.

[0021] Figure markings: 1-valve body; 2-liquid inlet pipe; 3-liquid outlet pipe; 4-valve chamber; 5-sealing chamber; 51-through groove; 6-valve port; 7-valve stem; 8-valve core disk; 9-valve core; 10-inspection port; 101-driving rod; 102-sleeve; 103-gear; 104-driving gear; 11-switching member; 111-control lever; 12-handle; 13-positioning groove; 14-positioning protrusion; 15-locking rod 16-inspection cover; 17-sealing gasket. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-6 As shown, this embodiment discloses a stop valve, including a valve body 1, characterized in that the valve body 1 is provided with a liquid inlet pipe 2 and a liquid outlet pipe 3, a valve cavity 4 is provided in the valve body 1, an inspection port 10 connected to the valve cavity 4 is provided on the valve body 1, and a maintenance cover 16 is provided on the inspection port 10 for rotating sealing; a sealing cavity 5 is also provided in the valve cavity 4, and a valve port 6 connecting the liquid inlet pipe 2 and the liquid outlet pipe 3 is provided in the sealing cavity 5; a valve stem 7 is provided on the valve body 1, and one end of the valve stem 7 located in the valve body 1 is rotatably connected to a valve core disk 8; the valve core disk 8 is slidably connected to the sealing cavity 5 and the connection is sealed; a plurality of vertical grooves are provided on the valve core disk 8, a valve core 9 is elastically connected in the vertical groove, and a switching member 11 for controlling the rotation of the valve core disk 8 is connected to the valve core disk 8; a driving mechanism connected to the valve stem 7 is also provided in the sealing cavity 5, and the driving mechanism is used to drive the valve core 9 located in the sealing cavity 5 to slide downward along the vertical groove.

[0024] The sealing cavity 5 is provided with a through groove 51 which fits the circumference of the valve core disk 8 . The through groove 51 is provided with a through hole which connects the sealing cavity 5 and the valve cavity 4 . One of the valve cores 9 is provided corresponding to the driving mechanism through the through hole.

[0025] The driving mechanism includes a driving rod 101 slidably arranged at the top of the sealing chamber 5, the driving rod 101 is arranged to pass through the sealing chamber 5 and corresponds to the valve core 9 located in the sealing chamber 5; it also includes a sleeve 102 rotatably arranged at the top of the sealing chamber 5 and threadedly connected to the driving rod 101, a gear 103 is fixedly connected to the outside of the sleeve 102, and a driving gear 104 engaged with the gear 103 is fixed on the valve stem 7.

[0026] The switching member 11 includes a control rod 111 that is rotatably arranged on the inner side of the valve stem 7 and has one end fixedly connected to the valve core disk 8. A rotational connection is set between the control rod 111 and the valve body 1. A handle 12 for controlling the rotation of the control rod 111 is set at one end of the control rod 111 located outside the valve body 1.

[0027] like Figure 1-2 As shown, the sealing chamber 5 is arranged in the valve chamber 4, and the sealing chamber 5 is connected with the liquid inlet pipe 2 and the liquid outlet pipe 3. When the fluid enters from the liquid inlet pipe 2, the fluid will enter the sealing chamber 5 and then flow out from the liquid outlet pipe 5. During the installation process, the upper and lower surfaces and side surfaces of the valve core disk 8 and the through groove 51 on the sealing chamber 5 are fitted with each other and hard-sealed, thereby reducing the flow of fluid in the sealing chamber 5 into the valve chamber 4. When the staff needs to close the valve port, the staff only needs to rotate the valve stem 7 through the turntable. The valve stem 7 will drive the driving gear 104 to rotate, thereby rotating the sleeve 102 through the gear 103. The sleeve 102 is threadedly connected to the drive rod 101, and the drive rod 101 is slidingly connected to the sealing chamber. Therefore, during the rotation of the sleeve 102, the lifting and lowering of the drive rod 101 can be controlled. When the drive rod 101 descends, it will contact the valve core 9 on the valve core disk 8, and at the same time press the valve core 9 downward to close the valve port 6, thereby cutting off the connection between the liquid inlet pipe 2 and the liquid outlet pipe, and realizing the closure of the valve.

[0028] During the use of the valve, if the staff finds that one of the valve cores is damaged and cannot be completely sealed, the staff will first move the valve core 9 away from the valve port 6 to open the valve to ensure the normal operation of the pipeline. Then, the staff will rotate the control rod 111 through the handle 12. The control rod is fixedly connected to the valve core disk 8, thereby driving the valve core disk 8 to rotate, thereby turning the spare valve core on the valve core disk 8 into the sealing chamber and corresponding to the valve port 6, realizing the switching of the damaged valve core. Then the staff can open the inspection cover 16, as shown in FIG. Figure 1 、 6As shown, the inspection cover 16 is fixedly connected to the valve body 1 by bolts and a sealing strip is provided between the valve body 1 and the inspection cover 16 to ensure daily sealing. After the staff opens the inspection cover 16, the valve chamber 4 is connected to the outside world. Therefore, the staff can replace and repair the damaged valve core through the inspection port, which is convenient for the staff to switch and use it next time. During this process, the valve is always in the open state to ensure that the fluid in the pipeline can flow normally. Compared with the existing technology, there is no need to stop the pipeline work and disassemble the valve as a whole, which improves the production efficiency of the equipment and saves the cost of repair and maintenance.

[0029] At the same time Figure 1 and 4 As shown, the valve core 9 includes an upper valve core and a lower valve core, and the upper valve core and the lower valve core are connected by threads, which facilitates the disassembly and installation of the valve core.

[0030] The sealing chamber 5 can isolate the valve core in the working position, i.e., located in the sealing chamber 5, and the spare valve core on the valve core disk 8, thereby preventing the spare valve core from being damaged by erosion and corrosion when the fluid in the pipeline flows, thereby improving the service life of the spare valve core.

[0031] In this embodiment, the valve core 9 is eccentrically arranged on the valve core disk 8, and a sealing gasket 17 is provided between the through groove 51 and the valve core disk 8. The sealing gasket 17 is used to seal the through groove 51 and the valve core disk 8.

[0032] like Figure 5 As shown, an elastic rubber sealing gasket 17 is provided on the inner side surface of the through groove 51. The rubber sealing gasket 17 is provided along the upper and lower edges of the through groove 51 and can fit the upper and lower surfaces of the valve core disk 8, thereby improving the sealing effect. At the same time, the upper surface of the sealing gasket is provided in an arc shape, so that when there is fluid in the sealing cavity, the pressure of the fluid can exert pressure on the upper surface of the sealing surface, so that the sealing gasket and the valve core disk fit more closely; at the same time, when the valve core disk rotates, the sealing gasket can scrape off the fluid remaining on the upper and lower surfaces of the valve core disk.

[0033] like Figure 5 As shown, the valve core disk 8 is provided with a plurality of positioning grooves 13 corresponding to the valve core 9, and the top of the through groove 51 is elastically connected with a positioning protrusion 14. When the valve core 9 corresponds to the driving mechanism, the positioning protrusion 14 is engaged with the positioning groove 13; through the setting of the positioning protrusion 14 and the positioning groove 13, the position of the valve core in the sealing cavity can be positioned, and the staff can be reminded whether the valve core is in place, thereby ensuring that the valve core corresponds to the driving rod.

[0034] In this embodiment, a sealing block is provided between the inspection cover 16 and the inspection port 10 , and the sealing block can improve the sealing effect of the valve cavity.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stop valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a liquid inlet pipe (2) and a liquid outlet pipe (3), the valve body (1) is provided with a valve cavity (4), the valve body (1) is provided with an inspection port (10) communicating with the valve cavity (4), and the inspection port (10) is provided with an inspection cover (16) for rotating sealing; the valve cavity (4) is further provided with a sealing cavity (5), and the sealing cavity (5) is provided with a valve port (6) communicating with the liquid inlet pipe (2) and the liquid outlet pipe (3); the valve body (1) is provided with a valve stem (7), and the valve stem (7) is located at the valve body (1). ) is rotatably connected to a valve core disk (8) at one end thereof; the valve core disk (8) is slidably connected to the sealing chamber (5) and a sealing arrangement is provided at the connection point; a plurality of vertical grooves are provided on the valve core disk (8), a valve core (9) is elastically connected in the vertical grooves, and a switching member (11) for controlling the rotation of the valve core disk (8) is connected to the valve core disk (8); a driving mechanism connected to the valve stem (7) is further provided in the sealing chamber (5), and the driving mechanism is used to drive the valve core (9) located in the sealing chamber (5) to slide downward along the vertical grooves to close the valve port (6); The sealing cavity (5) is provided with a through groove (51) that fits the circumference of the valve core disc (8), and the through groove (51) is provided with a through hole that connects the sealing cavity (5) and the valve cavity (4), and one of the valve cores (9) is provided corresponding to the driving mechanism through the through hole; The driving mechanism comprises a driving rod (101) slidably arranged at the top of the sealing chamber (5), the driving rod (101) penetrating the sealing chamber (5) and corresponding to the valve core (9) located in the sealing chamber (5); and further comprises a sleeve (102) rotatably arranged at the top of the sealing chamber (5) and threadedly connected to the driving rod (101), a gear (103) being fixedly connected to the outer side of the sleeve (102), and a driving gear (104) meshing with the gear (103) being fixed on the valve stem (7); The valve stem (7) drives the driving gear (104) to rotate, thereby rotating the sleeve (102) through the gear (103). The sleeve (102) is threadedly connected to the driving rod (101). At the same time, the driving rod (101) is slidably connected to the sealing chamber to control the lifting and lowering of the driving rod (101). When the driving rod (101) descends, it will contact the valve core (9) on the valve core disk (8), and at the same time press the valve core (9) downward to close the valve port (6); The switching member (11) comprises a control rod (111) rotatably arranged inside the valve stem (7) and having one end fixedly connected to the valve core disc (8); a rotational connection is arranged between the control rod (111) and the valve body (1); and a handle (12) for controlling the rotation of the control rod (111) is arranged at one end of the control rod (111) located outside the valve body (1); The handle (12) rotates the control rod (111), which is fixedly connected to the valve core disk (8), thereby driving the valve core disk (8) to rotate, thereby rotating the spare valve core on the valve core disk (8) into the sealing chamber and corresponding to the valve port (6), thereby realizing the switching of the damaged valve core.

2. A stop valve according to claim 1, characterized in that: The valve core (9) is eccentrically arranged on the valve core disk (8), and a sealing gasket (17) is arranged between the through groove (51) and the valve core disk (8). The sealing gasket (17) is used to seal between the through groove (51) and the valve core disk (8).

3. A stop valve according to claim 2, characterized in that: The valve core disk (8) is provided with a plurality of positioning grooves (13) corresponding to the valve core (9), and the top of the through groove (51) is elastically connected with a positioning protrusion (14). When the valve core (9) corresponds to the driving mechanism, the positioning protrusion (14) is engaged with the positioning groove (13).

4. A stop valve according to claim 1, characterized in that: A sealing block is provided between the inspection cover (16) and the inspection opening (10).

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