An industrial valve

Abstract

The present invention relates to an industrial valve, comprising a valve body, a valve cover, a valve stem, a valve core, a connecting spring, a sliding sealing ring, a valve stem nut, a fixed support rod and a handwheel. The annular groove can be tightly blocked by an elastic rubber sleeve in cooperation with an annular sealing block. In addition, by utilizing the thrust of water and cooperating with a hydraulic pressing member, the elastic rubber sleeve is deformed under pressure and fits more tightly with the wall surface of the annular groove, thereby solving the problem of fluid leakage between the valve core and the valve seat through hole. After the valve is used for a long time, the valve stem is prone to getting stuck. At this time, lubricating oil is injected into the oil filling groove, and the lubricating oil is brought out by the rotation of a smooth ball, making the valve stem easier to rotate. At the same time, this structure will not cause the lubricating oil to overflow, and the ball cooperation also makes the valve stem easier to rotate.

Description

Technical Field

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

[0002] Valves are control components in pipeline fluid delivery systems, used to change the cross-section of the passage and the direction of the medium's flow. They have functions such as diversion, shutoff, throttling, check valves, diversion, or overflow and pressure relief. Valves used for fluid control come in a wide variety of types and specifications, from the simplest globe valves to the most complex valves used in automatic control systems. They are primarily composed of three parts: the valve body, the opening and closing mechanism, and the valve cover.

[0003] The stop valve is the most widely used shut-off valve in chemical production. It uses the valve stem to lift and lower the circular valve disc (valve head) connected to it, and controls the opening and closing of the valve by changing the distance between the valve disc and the valve seat. Common problems in stop valves include: 1. When the stop valve cuts off the fluid, the valve disc blocks the through hole of the valve seat to achieve fluid blocking. However, under the thrust of water, over time, the fluid will seep out from the gap between the valve disc and the valve seat, causing internal leakage of the fluid, thus failing to achieve the ideal shut-off effect of the fluid; 2. The valve stem of the stop valve is prone to rust and jamming due to being kept in the same position for a long time. When the valve stem needs to be turned, it cannot be easily turned, resulting in poor operation and affecting use. In response to the two common problems, the present invention makes certain improvements to the structure of the stop valve. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an industrial valve.

[0005] An industrial valve includes a valve body, a valve cover, a valve stem, a valve core, a connecting spring, a sliding sealing ring, a valve stem nut, a fixed support rod and a handwheel. An inlet cavity, an outlet cavity and a central through hole are provided in the valve body. The central through hole connects the inlet cavity and the outlet cavity and an annular groove is provided on the circumferential cavity wall of the central through hole. The upper end of the valve body is fixedly connected to the valve cover by a threaded column. The middle part of the valve cover is rotatably connected to the valve stem. The lower end of the valve stem is provided with a valve core in cooperation with the central through hole. The upper end of the valve core is fixedly connected to the connecting spring and the connecting spring is sleeved on the valve stem. The upper end of the connecting spring is fixedly connected to the sliding sealing ring. The sliding sealing ring is connected to the valve stem in a sliding manner. The valve stem is connected to the valve stem with a valve stem nut in a threaded manner. The valve stem nut is fixedly connected to the valve cover through fixed support rods symmetrically arranged on the left and right. A handwheel is fixedly installed on the upper end of the valve stem.

[0006] The valve core includes a stepped valve disc, a hydraulic pressure piece, an annular sealing block and a connecting and fixing block. A stepped valve disc is provided at the lower end of the valve stem and cooperates with the central through hole. A stepped cylindrical groove is provided in the middle of the lower end of the stepped valve disc. The hydraulic pressure piece is connected to the stepped cylindrical groove in a sliding manner. The lower end of the stepped valve disc is connected to the annular sealing block in a sliding manner. The annular sealing block is sealed in the annular groove. Connecting and fixing blocks are evenly arranged on the upper end of the annular sealing block. The connecting and fixing block is rotatably connected to the hydraulic pressure piece.

[0007] Preferred technical solution one: The hydraulic pressure part includes a floating block, a telescopic connecting rod and a central fixed rod. The floating block is connected to the stepped cylindrical groove in a sliding manner. The circumferential end surface of the floating block is evenly provided with connecting grooves. The telescopic connecting rod is rotatably connected in the connecting groove. The end of the telescopic connecting rod away from the floating block is rotatably connected to the connecting fixed block. The middle part of the telescopic connecting rod is rotatably connected to the central fixed rod, and the central fixed rod is fixedly connected to the stepped valve disc.

[0008] Preferred technical solution two: The upper end of the valve stem nut is symmetrically provided with an oil filling groove, and a cylindrical plug is provided at the upper end of the oil filling groove. A ball is provided at the top of the internal thread of the valve stem nut in the vertical direction, and the ball cooperates with the groove at the bottom of the external thread of the valve stem, and a connecting through hole is provided between the ball and the oil filling groove.

[0009] Preferred technical solution three: the portion of the annular sealing block protruding from the stepped valve disc is covered with an elastic rubber sleeve, and the elastic rubber sleeve is fixedly mounted on the lower end of the stepped valve disc.

[0010] Preferred technical solution four: an annular rubber pad is fixedly installed on the upper end of the sliding sealing ring, and the sliding sealing ring needs to cover the joint between the valve body and the valve cover.

[0011] Preferred technical solution five: the floating block is in the shape of a stepped cylinder, and the length of the cylinder on its lower side needs to be longer than the movement gap left on the upper side of the stepped cylindrical groove.

[0012] Preferred technical solution six: an annular stepped gasket is provided between the stepped valve disc and the central through hole.

[0013] The present invention has the following beneficial effects: 1. An industrial valve provided by the present invention includes a valve body, a valve cover, a valve stem, a valve core, a connecting spring, a sliding sealing ring, a valve stem nut, a fixed support rod and a handwheel. The annular groove can be tightly blocked by an elastic rubber sleeve in cooperation with an annular sealing block. In addition, by utilizing the thrust of water and cooperating with a hydraulic pressure member, the elastic rubber sleeve is deformed under pressure and fits more tightly with the wall of the annular groove, thereby solving the problem of fluid leakage between the valve core and the valve seat through-hole; after the valve is used for a long time, the valve stem is prone to jamming. At this time, lubricating oil is injected into the oil filling groove, and the lubricating oil is brought out by the rotation of the smooth ball, making the valve stem easier to rotate. At the same time, this structure will not cause lubricating oil overflow, and the ball cooperation also makes the valve stem easier to rotate.

[0014] 2. The hydraulic compression member provided in the present invention causes the floating block to move upward by the thrust of the fluid on the floating block. The floating block with the telescopic connecting rod tilts upward on the side close to the floating block, and tilts downward on the side close to the connecting fixed block to squeeze the annular sealing block so that it fits tightly with the annular groove.

[0015] 3. The sliding sealing ring provided in the present invention prevents the sliding sealing ring from squeezing the inner end surface of the valve cover and causing wear by providing an annular rubber pad on the upper end surface of the sliding sealing ring. The sliding sealing ring blocks the connecting seam between the valve body and the valve cover, thereby avoiding possible leakage between the valve body and the valve cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the main plane structure of the present invention.

[0018] Figure 3 For the present invention Figure 2 Enlarged view of point M in the middle.

[0019] Figure 4 For the present invention Figure 3 Cross-section at AA in the middle.

[0020] Figure 5 For the present invention Figure 3 Cross-section at the middle BB.

[0021] Figure 6 For the present invention Figure 2 Enlarged view of point N in the middle.

[0022] In the figure: 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Valve core; 41. Stepped valve disc; 42. Hydraulic pressure piece; 421. Floating block; 422. Telescopic connecting rod; 423. Center fixing rod; 43. Annular sealing block; 44. Connecting fixing block; 45. Elastic rubber sleeve; 46. Annular stepped gasket; 5. Connecting spring; 6. Sliding sealing ring; 60. Annular rubber gasket; 7. Valve stem nut; 71. Cylindrical plug; 72. Ball; 8. Fixed support frame; 9. Handwheel. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See Figure 1 and Figure 2 , an industrial valve, including valve body 1, valve cover 2, valve stem 3, valve core 4, connecting spring 5, sliding sealing ring 6, valve stem nut 7, fixed support frame 8 and handwheel 9. The valve body 1 is provided with an inlet cavity, an outlet cavity and a valve seat through hole. The valve seat through hole connects the inlet cavity and the outlet cavity and an annular groove is provided on the circumferential cavity wall of the valve seat through hole. The upper end of the valve body 1 is fixedly connected to the valve cover 2 by a threaded column, the middle of the valve cover 2 is rotatably connected to the valve stem 3, the lower end of the valve stem 3 is provided with a valve core 4 in cooperation with the valve seat through hole, the upper end of the valve core 4 is fixedly connected to the connecting spring 5 and the connecting spring 5 is sleeved on the valve stem 3, the upper end of the connecting spring 5 is fixedly connected to the sliding sealing ring 6, the sliding sealing ring 6 and the valve stem 3 are connected in a sliding manner, the valve stem 3 is connected to the valve stem nut 7 in a threaded manner, the valve stem nut 7 and the valve cover 2 are fixedly connected by a fixed support frame 8 symmetrically arranged on the left and right, and a handwheel 9 is fixedly installed on the upper end of the valve stem 3.

[0025] The worker first fixedly connected the inlet and outlet cavities of the valve body 1 to the fluid inlet pipe and the fluid outlet pipe respectively, and then controlled the valve stem 3 to rotate in one direction by turning the handwheel 9, so that the valve core 4 and the valve seat through hole were sealed and blocked to cut off the fluid. The reverse rotation separated the valve core 4 from the valve seat through hole to achieve smooth flow of the fluid.

[0026] See Figure 2 、 Figure 3 、 Figure 4 and Figure 5The valve core 4 includes a stepped valve disc 41, a hydraulic pressure piece 42, an annular sealing block 43 and a connecting and fixing block 44. A stepped valve disc 41 is provided at the lower end of the valve stem 3 and cooperates with the valve seat through hole. A stepped cylindrical groove is provided in the middle of the lower end of the stepped valve disc 41. The hydraulic pressure piece 42 is connected to the stepped cylindrical groove in a sliding manner. The lower end of the stepped valve disc 41 is connected to an annular sealing block 43 in a sliding manner. The annular sealing block 43 is sealed in the annular groove. Connecting and fixing blocks 44 are evenly arranged on the upper end of the annular sealing block 43. The connecting and fixing block 44 is rotatably connected to the hydraulic pressure piece 42; when the fluid is cut off, the thrust of the fluid on the hydraulic pressure piece 42 is used to make the hydraulic pressure piece 42 act on the connecting and fixing block 44, thereby pressing the annular sealing block 43 down to tightly cooperate with the annular groove to prevent fluid leakage.

[0027] See Figure 2 、 Figure 3 and Figure 4 The hydraulic pressure member 42 includes a floating block 421, a retractable connecting rod 422 and a central fixed rod 423. The floating block 421 is connected to the stepped cylindrical groove in a sliding manner. The circumferential end surface of the floating block 421 is evenly provided with connecting grooves. The retractable connecting rod 422 is rotatably connected in the connecting groove. The end of the retractable connecting rod 422 away from the floating block 421 is rotatably connected to the connecting and fixing block 44. The middle part of the retractable connecting rod 422 is rotatably connected to the central fixed rod 423, and the central fixed rod 423 is fixedly connected to the stepped valve disc 41; the floating block 421 is moved upward by the thrust of the fluid on the floating block 421, and the floating block 421 tilts upward with the side of the retractable connecting rod 422 close to the floating block 421, and tilts downward with the side close to the connecting and fixing block 44 to squeeze the annular sealing block 43 so that it fits tightly with the annular groove.

[0028] See Figure 2 and Figure 6 The upper end of the valve stem nut 7 is symmetrically provided with an oil filling groove, and a cylindrical plug 71 is provided at the upper end of the oil filling groove. A ball 72 is provided at the top of the internal thread of the valve stem nut 7 in the vertical direction, and the ball 72 cooperates with the groove at the bottom of the external thread of the valve stem 3, and a connecting through hole is provided between the ball 72 and the oil filling groove; after using the valve for a long time, the valve stem 3 is prone to getting stuck. At this time, lubricating oil is injected into the oil filling groove, and the lubricating oil is brought out by the rotation of the smooth ball 72, making the valve stem 3 easier to rotate. At the same time, this structure will not cause the lubricating oil to overflow, and the cooperation of the ball 72 also makes the valve stem 3 easier to rotate.

[0029] See Figure 2 、 Figure 3 and Figure 5The part of the annular sealing block 43 protruding from the stepped valve disc 41 is covered with an elastic rubber sleeve 45, and the elastic rubber sleeve 45 is fixedly installed at the lower end of the stepped valve disc 41; the elastic rubber sleeve 45 cooperates with the annular sealing block 43 to tightly block the annular groove, and by utilizing the thrust of water and cooperating with the hydraulic pressing member 42, the elastic rubber sleeve 45 is deformed under pressure and fits more tightly with the wall of the annular groove, thereby solving the problem of fluid leakage between the valve core 4 and the valve seat through hole.

[0030] See Figure 2 An annular rubber pad 60 is fixedly installed on the upper end of the sliding sealing ring 6, and the sliding sealing ring 6 needs to cover the joint between the valve body 1 and the valve cover 2; the annular rubber pad 60 prevents the sliding sealing ring 6 from squeezing the inner end surface of the valve cover 2 and causing wear, and the sliding sealing ring 6 further prevents possible leakage between the valve body 1 and the valve cover 2.

[0031] See Figure 2 and Figure 3 The floating block 421 is in the shape of a stepped cylinder, and the length of the cylinder on the lower side must be longer than the moving gap left on the upper side of the stepped cylindrical groove.

[0032] See Figure 2 and Figure 3 An annular stepped gasket 46 is provided between the stepped valve disc 41 and the valve seat through hole.

[0033] During specific operation: after the valve is installed in the connecting pipe, the valve core 4 is controlled by turning the handwheel 9 to realize the circulation or cutoff of the fluid. When in the cut-off state, the floating block 421 is pushed up by the fluid to drive the retractable connecting rod 422 to rotate a certain angle, thereby squeezing the annular sealing block 43, so that the elastic rubber sleeve 45 fits closely in the annular groove, which can effectively realize the sealing of the fluid on and off point. At the same time, the sliding sealing ring 6 provided has a further anti-leakage effect on the seal between the valve cover 2 and the valve body 1; when the rotation of the valve stem 3 is not smooth, lubricating oil can be injected into the oil filling groove, and the valve stem 3 can be slowly rotated. The ball 72 cooperates with the rotation so that the lubricating oil lubricates the valve stem 3 to facilitate rotation.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An industrial valve, comprising a valve body, a valve cover, a valve stem, a valve core, a connecting spring, a sliding sealing ring, a valve stem nut, a fixed support frame and a handwheel, characterized in that: The valve body is provided with an inlet cavity, an outlet cavity and a valve seat through hole, the valve seat through hole connects the inlet cavity and the outlet cavity, and an annular groove is provided on the circumferential cavity wall of the valve seat through hole, the upper end of the valve body is fixedly connected to the valve cover by a threaded column, the middle of the valve cover is rotatably connected to the valve stem, the lower end of the valve stem is provided with a valve core in cooperation with the valve seat through hole, the upper end of the valve core is fixedly connected to a connecting spring, and the connecting spring is sleeved on the valve stem, the upper end of the connecting spring is fixedly connected to a sliding sealing ring, the sliding sealing ring and the valve stem are connected in a sliding manner, the valve stem is connected to a valve stem nut in a threaded manner, the valve stem nut is fixedly connected to the valve cover by a fixed support frame symmetrically arranged on the left and right, and a hand wheel is fixedly installed on the upper end of the valve stem, wherein: The valve core includes a stepped valve disc, a hydraulic pressure piece, an annular sealing block and a connecting and fixing block. A stepped valve disc is provided at the lower end of the valve stem and cooperates with the valve seat through hole. A stepped cylindrical groove is provided in the middle of the lower end of the stepped valve disc. The hydraulic pressure piece is connected to the stepped cylindrical groove in a sliding manner. The lower end of the stepped valve disc is connected to the annular sealing block in a sliding manner. The annular sealing block is sealed in the annular groove. Connecting and fixing blocks are evenly arranged on the upper end of the annular sealing block. The connecting and fixing block is rotatably connected to the hydraulic pressure piece. The hydraulic pressure part includes a floating block, a telescopic connecting rod and a central fixed rod. The floating block is connected to the stepped cylindrical groove in a sliding manner. The circumferential end surface of the floating block is evenly provided with connecting grooves. The telescopic connecting rod is rotatably connected in the connecting groove. The end of the telescopic connecting rod away from the floating block is rotatably connected to the connecting fixed block. The middle part of the telescopic connecting rod is rotatably connected to the central fixed rod, and the central fixed rod is fixedly connected to the stepped valve disc.

2. An industrial valve according to claim 1, characterized in that: The upper end of the valve stem nut is symmetrically provided with an oil filling groove, the upper end of the oil filling groove is provided with a cylindrical plug, a ball is provided at the top of the internal thread in the vertical direction of the valve stem nut and the ball cooperates with the groove at the bottom of the external thread of the valve stem, and a connecting through hole is provided between the ball and the oil filling groove.

3. An industrial valve according to claim 1, characterized in that: The portion of the annular sealing block protruding from the stepped valve disc is covered with an elastic rubber sleeve, and the elastic rubber sleeve is fixedly mounted on the lower end of the stepped valve disc.

4. An industrial valve according to claim 1, characterized in that: An annular rubber pad is fixedly mounted on the upper end of the sliding sealing ring, and the sliding sealing ring needs to cover the joint between the valve body and the valve cover.

5. The industrial valve according to claim 1, characterized in that: The floating block is in the shape of a stepped cylinder, and the length of the cylinder on the lower side thereof needs to be longer than the movement gap left on the upper side of the stepped cylindrical groove.

6. An industrial valve according to claim 1, characterized in that: An annular stepped gasket is provided between the stepped valve disc and the valve seat through hole.

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