Dual-seal stop valve with long sealing life

Abstract

The utility model relates to the technical field of stop valves, in particular to a dual-seal stop valve with long sealing life, which comprises a stop valve, a valve plate is slidably arranged on the inner side of the stop valve, a threaded rod is screwed and mounted on the inner side of the valve plate, the upper end of the threaded rod rotatably penetrates to the upper side of the stop valve, a pressure relief hole is arranged on the valve plate, and a pressure relief component is arranged on the side edge of the valve plate. The pressure relief assembly comprises a sliding block and a sealing fixing cover plate, a sealing plug is fixedly installed on the sliding block, a sliding rod is fixedly installed at the end of the sliding block, a sliding barrel is fixedly installed on the outer side of the sealing fixing cover plate, the sliding rod penetrates through the outer side of the sliding barrel in a sliding mode, and a first spring is fixedly connected between the inner side of the sealing fixing cover plate and the sliding block. The pressure relief hole is formed in the valve plate, meanwhile, the pressure relief assembly is arranged on the side edge of the pressure relief hole, and the combination design of the sliding block, the sliding rod, the sealing plug and the first spring is utilized in the pressure relief assembly, so that the multifunctionality of the stop valve is achieved, and the application range of the stop valve is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to cut -off valve technical field especially relates to a double -sealed cut -off valve of long sealing life. BACKGROUND

[0002] The cut -off valve is also called the cut -off valve and belongs to the forced sealing type valve and is a common fluid control equipment.

[0003] The utility model discloses a double -sealed cut -off valve of long sealing life, including the valve body, the valve stem, the valve cover and the transmission mechanism, set up the valve seat between the valve body import passage and export passage, the valve body channel center line horizontal installation is on the pipeline, the valve stem upper end is connected the side valve cavity in the valve seat export place and sets up a sealing body, the valve seat is towards the valve body import place and sets up the filter section, the valve seat adopts the convex sealing surface and the sealing body and engages, and the valve body is located the valve cover a section and is outward from inside in proper order and sets up the sealing cylinder and spring. The utility model discloses through two sealing structures, improves its sealing property. One sealing structure includes the valve stem, the sealing body and the convex sealing surface, and the valve stem tightens the sealing body and the valve seat convex sealing surface and cooperates with each other and seals, and another sealing structure includes the spring, the valve cover and the sealing cylinder, and the sealing cylinder keeps with the valve stem under the action of the spring High degree of adhesion, thereby realizing good sealing property.

[0004] The cut -off valve in the above -mentioned patent has one -way cut -off effect, and the positive medium pressure pushes away the sealing body to open the valve and performs passive pressure relief action, so that the cut -off valve can only be used as a one -way valve, and the functionality is relatively single. In order to solve the above -mentioned technical problems, the utility model provides a double -sealed cut -off valve of long sealing life. Utility model content

[0005] The utility model discloses a double -sealed cut -off valve of long sealing life, which solves the defects in the prior art.

[0006] In order to achieve the above -mentioned purpose, the utility model adopts the following technical scheme:

[0007] A double -sealed cut -off valve of long sealing life, including cut -off valve, the valve plate is slidably arranged in the cut -off valve, the threaded rod is screw -connected and installed on the inner side of the valve plate, the threaded rod upper end rotates and penetrates to the upper side of the cut -off valve, the pressure relief hole is formed in the valve plate, and the pressure relief assembly is arranged on the side edge of the valve plate.

[0008] Further, the installation hole is arranged in the inner side of the pressure relief hole, the second spring is fixedly installed in the inner side of the installation hole, and the sealing cover plate is fixedly installed at the outer side end of the second spring.

[0009] Further, the diameter of the sealing cover plate is larger than the inner diameter of the installation hole, and the diameter of the sealing plug is larger than the inner diameter of the pressure relief hole.

[0010] Further, the threaded butt joint is symmetrically and fixedly installed on both sides of the stop valve.

[0011] Further, the installation groove is fixedly installed on the side wall of the threaded butt joint, the sealing fixed cover plate is fixedly installed at the outer side end of the installation groove, and the sliding block is in sliding contact with the inner wall of the installation groove.

[0012] Further, the handle cover is fixedly installed at the outer side end of the sliding rod.

[0013] Further, the stable cylinder is fixedly installed at the upper side end of the stop valve, the threaded rod is rotationally connected with the inner side of the stable cylinder, the sealing ring is embedded at the outer side port of the stable cylinder, and the rotating disc is fixedly installed at the upper side end of the threaded rod.

[0014] Further, the internal sliding groove is arranged in the inner side of the stop valve, the valve plate is slidingly arranged in the inner side of the internal sliding groove, and the sealing rubber pad is installed in the inner side of the internal sliding groove.

[0015] Compared with the related art, the double-sealing stop valve with long sealing life has the following beneficial effects:

[0016] In the double-sealing stop valve with long sealing life, the pressure relief hole is arranged on the valve plate, the pressure relief assembly is arranged at the side of the pressure relief hole, the combination of the sliding block, the sliding rod, the sealing plug and the first spring is used in the pressure relief assembly, the sliding rod is manually pulled when pressure relief is needed, the sliding rod drives the sliding block and the sealing plug to separate from the plugging of the pressure relief hole, the closed valve plate can be used as a one-way valve at this time, the valve plate has a bidirectional flow blocking effect when the sealing plug plugs the pressure relief hole, the threaded rod is manually rotated to drive the valve plate to slide in the inner side of the stop valve, the internal flow of the stop valve is adjusted, the adjusting effect is realized, the stop valve can be used as a normal regulating valve at this time, the multifunctionality of the stop valve is realized through the arrangement of the pressure relief assembly, and the application range is expanded. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model provides a kind of double-sealing stop valve with long sealing life of the utility model proposes the three-dimensional structure diagram of Figure 1 ;

[0018] Figure 2 The utility model provides a kind of three-dimensional structure schematic diagram of double sealing stop valve with long sealing life Figure 2 ;

[0019] Figure 3 The utility model provides a kind of three-dimensional split structure schematic diagram of double sealing stop valve with long sealing life;

[0020] Figure 4 It is three-dimensional disassembly structure schematic diagram for valve plate;

[0021] Figure 5 It is three-dimensional cut structure schematic diagram for valve plate;

[0022] Figure 6 It is three-dimensional structure schematic diagram for pressure relief assembly.

[0023] In the drawing: 1, stop valve;2, threaded butt joint;3, internal sliding groove;31, sealing rubber mat;4, valve plate;5, installation groove;6, pressure relief assembly;61, sliding block;62, sealing plug;63, sliding rod;64, sealing fixed cover plate;65, first spring;66, sliding cylinder;67, handle cover;7, stabilizing cylinder;71, sealing ring;8, threaded rod;9, rotating disc;10, pressure relief hole;11, mounting hole;12, second spring;13, sealing cover plate. DETAILED DESCRIPTION

[0024] The utility model will be further described below in connection with the drawings and embodiment.

[0025] Referring to Figures 1-6 A kind of double sealing stop valve with long sealing life: including stop valve 1, valve plate 4 is arranged in the inside sliding of stop valve 1, threaded rod 8 is screw-connected and installed in the inside of valve plate 4, threaded rod 8 upper end rotates and passes to the upper side of stop valve 1, pressure relief hole 10 is set up on valve plate 4, pressure relief assembly 6 is arranged in the side of valve plate 4;Pressure relief assembly 6 includes sliding block 61 and sealing fixed cover plate 64, sealing plug 62 is fixedly installed on sliding block 61, sliding rod 63 is fixedly installed on the end of sliding block 61, sliding cylinder 66 is fixedly installed on the outside of sealing fixed cover plate 64, sliding rod 63 slides and passes to the outside of sliding cylinder 66, first spring 65 is fixedly connected between the inside of sealing fixed cover plate 64 and sliding block 61, handle cover 67 is fixedly installed on the outside end of sliding rod 63.

[0026] In the present manner, stabilizing cylinder 7 is fixedly installed on the upper end of stop valve 1, threaded rod 8 is rotatably connected with the inside of stabilizing cylinder 7, sealing ring 71 is embedded at the outside port of stabilizing cylinder 7, rotating disc 9 is fixedly installed on the upper end of threaded rod 8.

[0027] By the above-mentioned mode, the setting of rotating disc 9, it is convenient to manually adjust and drive threaded rod 8 to rotate, the setting of sealing ring 71 makes the rotatable connection of threaded rod 8 keep sealability.

[0028] In the mode, the inside of the stop valve 1 is provided with an internal chute 3, the valve plate 4 is slidably arranged in the inside of the internal chute 3, and a sealing rubber pad 31 is arranged in the inside of the internal chute 3.

[0029] Through the above-mentioned mode, the valve plate 4 is arranged in the inside of the internal chute 3, and the two sides of the internal chute 3 and the sealing rubber pad 31 are arranged, so that the valve plate 4 has double sealing property.

[0030] In the mode, the inside of the pressure relief hole 10 is provided with a mounting hole 11, the second spring 12 is fixedly arranged in the inside of the mounting hole 11, the sealing cover plate 13 is fixedly arranged at the outer side of the second spring 12, the first spring 65 and the second spring 12 are made of stainless steel, the first spring 65 is a rebound spring, and the second spring 12 is a pull-back spring.

[0031] Through the above-mentioned mode, the first spring 65 can provide rebound force to push the sliding block 61 to drive the sealing plug 62 to block the pressure relief hole 10, so that the valve body has bidirectional flow blocking effect in the normal use state, the pull-back force provided by the second spring 12 can drive the sealing cover plate 13 to block the end of the mounting hole, when the fluid flows forward, the forward medium pressure overcomes the pull-back force of the second spring 12, so that the sealing cover plate 13 is opened, and when the fluid flows reversely, the sealing cover plate 13 always keeps closed, so that the valve body can be used as a check valve.

[0032] In the mode, the diameter of the sealing cover plate 13 is greater than the inner diameter of the mounting hole 11, and the diameter of the sealing plug 62 is greater than the inner diameter of the pressure relief hole 10.

[0033] Through the above-mentioned mode, the diameter of the sealing cover plate 13 is greater than the inner diameter of the mounting hole 11, and the diameter of the sealing plug 62 is greater than the inner diameter of the pressure relief hole 10, so that the sealing cover plate 13 and the sealing plug 62 have good covering sealing performance.

[0034] In the mode, the stop valve 1 is fixedly arranged on the two sides in a symmetrical mode and is provided with a threaded butt joint 2, the threaded butt joint 2 is fixedly arranged on the side wall and is provided with a mounting groove 5, the sealing fixed cover plate 64 is fixedly arranged at the outer side end of the mounting groove 5, and the sliding block 61 is in sliding contact with the inner wall of the mounting groove 5.

[0035] Through the above-mentioned mode, the threaded butt joint 2 is arranged, so that the stop valve 1 can be conveniently butt-jointed and arranged on the corresponding pipeline.

[0036] The working principle of the double-sealing stop valve with long sealing life is as follows:

[0037] In use, by rotating the rotating disc 9, the threaded rod 8 is driven to rotate, the threaded rod 8 drives the valve plate 4 to slide in the inside of the stop valve 1, so as to change the flow capacity of the stop valve 1, when the valve plate 4 is closed, at this time, the first spring 65 provides the rebound force to drive the sliding block 61 to drive the sealing plug 62 to seal the pressure relief hole 10, so that the stop valve 1 has the bidirectional flow blocking effect in the normal use state, when the sliding rod 63 is pulled to drive the sealing plug 62 to slide to one side of the pressure relief hole 10, at this time, one side of the pressure relief hole 10 is in an open state, the rebound force provided by the second spring 12 can drive the sealing cover plate 13 to seal the end of the mounting hole, when the fluid flows forward, the forward medium pressure overcomes the rebound force of the second spring 12, so that the sealing cover plate 13 is opened, when the fluid flows reversely, the sealing cover plate 13 always keeps closed, at this time, the valve body can be used as a one-way valve, so that the multifunction is realized.

[0038] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the utility model specification and the attached drawing contents, or direct or indirect application in other related technical fields, are all included in the patent protection range of the utility model.

Claims

1. A double-seal globe valve having a long seal life, characterized by The utility model provides a cut -off valve (1), cut -off valve (1) inside slide is provided with the valve plate (4), the threaded rod (8) is screw connected and installed in the inside of valve plate (4), threaded rod (8) upper end rotates and passes to cut -off valve (1) upside, the valve plate (4) is opened on the upper and is provided with pressure relief assembly (6) on the side of valve plate (4); The pressure relief assembly (6) includes a sliding block (61) and a sealing fixed cover plate (64), the sealing plug (62) is fixedly installed on the sliding block (61), the sliding rod (63) is fixedly installed on the end of the sliding block (61), the sealing fixed cover plate (64) is fixedly installed on the outside of the sliding cylinder (66), the sliding rod (63) is slidably arranged outside the sliding cylinder (66), and the first spring (65) is fixedly connected between the inside of the sealing fixed cover plate (64) and the sliding block (61).

2. The long seal life double block valve of claim 1, wherein The inside of the pressure relief hole (10) is provided with a mounting hole (11), the second spring (12) is fixedly installed in the inside of the mounting hole (11), the sealing cover plate (13) is fixedly installed on the outside end of the second spring (12), the first spring (65) and the second spring (12) are made of stainless steel, the first spring (65) is a rebound spring, the second spring (12) is a pullback spring, the diameter of the sealing cover plate (13) is greater than the inner diameter of the mounting hole (11), and the diameter of the sealing plug (62) is greater than the inner diameter of the pressure relief hole (10).

3. The long seal life double block valve of claim 1, wherein, The cut -off valve (1) is fixedly installed on both sides of the symmetrical threaded butt joint (2).

4. The long seal life double block valve of claim 3, wherein The threaded butt joint (2) is fixedly installed on the side wall of the mounting groove (5), the sealing fixed cover plate (64) is fixedly installed on the outside end of the mounting groove (5), and the sliding block (61) is in sliding contact with the inner wall of the mounting groove (5).

5. The long seal life double block valve of claim 1 wherein, The handle cover (67) is fixedly installed on the outside end of the sliding rod (63).

6. The long seal life double block valve of claim 1, wherein The threaded rod (8) is rotatably connected with the inside of the stabilizing cylinder (7), the sealing ring (71) is embedded in the outside port of the stabilizing cylinder (7), and the threaded rod (8) is fixedly installed on the upper end of the rotating disc (9).

7. The long seal life double block valve of claim 1 wherein, The inside of the cut -off valve (1) is provided with an internal sliding groove (3), the valve plate (4) is slidably arranged in the inside of the internal sliding groove (3), and the sealing rubber pad (31) is installed in the inside of the internal sliding groove (3).

Images