Sealed stop valve with self-aligning positioning

Abstract

The application discloses a sealing type stop valve with centering and positioning, and belongs to the technical field of stop valves, which comprises a valve body, a valve seat matched with the valve body, a valve assembly connected with the valve body, a first limiting clamping base fixed to one end of a sealing rod away from a valve port, one end of the first limiting clamping base connected to a second limiting clamping base through an intermediate clamping plate, a transmission rod middle part threadedly connected with the valve body, and the other end of the transmission rod extending out of the valve body; a first through groove is formed in the end face of the first limiting clamping base, a second through groove is formed in the end face of the second limiting clamping base, the two sides of the intermediate clamping plate are respectively provided with a first sliding fit assembly and a second sliding fit assembly, the first sliding fit assembly and the second sliding fit assembly are respectively in sliding fit with the first through groove and the second through groove, and the first sliding fit assembly and the second sliding fit assembly are perpendicular to each other. The stop valve can center and position the valve disc when the valve is closed, so that the sealing property of the stop valve is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of stop valves, and particularly relates to a sealing type stop valve with centering positioning. BACKGROUND

[0002] The stop valve is also called a stop gate valve, and belongs to a forced sealing type valve. When the valve is closed, pressure needs to be applied to the valve disc to force the sealing surface to be leakproof. When the valve needs to be closed, a large resistance needs to be overcome. Affected by device aging and machining precision, the center axis of the valve rod screw hole and the valve exist errors, and the valve rod is prone to top bending in the later period, which seriously affects the sealing property of the valve for a long time. SUMMARY

[0003] Therefore, the application aims to provide a sealing type stop valve with centering positioning, which can properly center and position the valve disc when the valve is closed, so as to ensure the sealing property of the stop valve.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme.

[0005] The sealing type stop valve with centering positioning comprises a valve body, a valve seat matched with the valve body, a valve assembly connected with the valve body, a valve port provided on the valve seat, the valve port being capable of being closed by the valve assembly, a plurality of through holes communicated with the valve port and provided on the outer circumference of the valve seat, a lock sleeve provided on the inner side of the valve seat in an axial direction, a sealing rod coaxially fixed with the lock sleeve, a valve disc fixed on one end of the sealing rod and facing the valve port, a first limiting seat fixed on the other end of the sealing rod and away from the valve port, one end of the first limiting seat connected to the second limiting seat through an intermediate clamping plate, the other end of the second limiting seat coaxially connected to one end of a transmission rod, the middle part of the transmission rod threadedly connected with the valve body, and the other end of the transmission rod extending out of the valve body. The end surface of the first limiting seat is provided with a first through groove, the end surface of the second limiting seat is provided with a second through groove, the two sides of the intermediate clamping plate are respectively provided with a first sliding fitting assembly and a second sliding fitting assembly, the first sliding fitting assembly and the second sliding fitting assembly are respectively in sliding fit with the first through groove and the second through groove, and the first sliding fitting assembly and the second sliding fitting assembly are perpendicular to each other.

[0006] Further, first sliding groove and second sliding groove are respectively arranged on two sides of the intermediate clamping plate, the first sliding groove and the second sliding groove correspond to the first through groove and the second through groove respectively, the first sliding fitting assembly and the second sliding fitting assembly are the same in structure but perpendicular in arrangement direction, the first sliding fitting assembly comprises a center block, a first spring, a second spring, a first sliding block and a second sliding block, the center block is fixed in the center of the first sliding groove, two sides of the center block are connected to the first sliding block and the second sliding block through the first spring and the second spring respectively, and the first sliding block and the second sliding block are slidingly arranged in the first sliding groove.

[0007] Further, the first sliding groove and the first through groove are T-shaped grooves, and the two ends of the first sliding block and the second sliding block are integrally provided with T-shaped protrusions corresponding to the T-shaped grooves.

[0008] Further, the center of the first sliding block and the second sliding block is provided with a spherical embedding groove, a ball is rollingly matched in the spherical embedding groove, and the outer surface of the ball protrudes from the side surface of the first sliding block or the second sliding block.

[0009] Further, a step is arranged on the circumferential surface of the first limiting clamping seat, a threaded through hole is arranged on the step, a supporting pin is matched in the threaded hole, and the inner end of the supporting pin extends to the side of the first through groove and contacts the ball.

[0010] Further, a plurality of L-shaped supporting rods are uniformly fixed on the outer circumference of the intermediate clamping plate, a sleeve is arranged on the outer end of the L-shaped supporting rod, an arc-shaped plate is fixed on the outer end of the sleeve, the outer side wall of the arc-shaped plate is slidingly matched with the inner wall of the valve body in the circumferential direction, an elastic recovery device is further connected between the arc-shaped plate and the L-shaped supporting rod, and a pressure sensor is further arranged between the elastic recovery device and the arc-shaped plate.

[0011] Further, an extension pipe is connected to the outer side of the transmission rod, a channel for the transmission rod to pass through is formed in the inner side of the extension pipe, a fixing ring and a pushing ring are arranged in the channel, a filler is arranged between the fixing ring and the pushing ring, a valve cover is threadedly connected to the outer side of the extension pipe, and the inner end of the valve cover contacts the pushing ring.

[0012] Further, an outer thread is arranged on the outer side of the lock sleeve, and an inner thread matched with the outer thread is arranged on the inner side of the valve seat.

[0013] Further, a sliding rod is slidingly arranged in the through hole, a wedge-shaped surface contacting the valve clack is formed on the inner end of the sliding rod, a groove is arranged in the middle of the outer side surface of the sliding rod, the inner end of the sliding rod can form a seal with the through hole, and a fourth spring is connected between the sliding rod and the inner wall of the valve body.

[0014] The beneficial effects of the present application are as follows:

[0015] This invention features a self-aligning, sealing-type gate valve. The original valve stem is segmented into an interconnected sealing rod and a transmission rod, connected by an intermediate clamp. When an external bending moment acts on the transmission rod, it rotates, and the torque is transmitted to the intermediate clamp via a second limiting seat. The intermediate clamp then transmits the torque to the sealing rod via a first limiting seat, thereby displacing the valve disc to close the valve port. This design avoids problems such as bending of the long, straight section of the valve stem due to excessive pressure without affecting the threaded transmission.

[0016] The shut-off valve of this invention, because the first sliding engagement component and the second sliding engagement component are respectively slidably engaged with the first through groove and the second through groove, and the first sliding engagement component and the second sliding engagement component are perpendicular to each other, regardless of whether the transmission rod and the sealing rod are axially misaligned due to aging or wear of the device, the first sliding engagement component can move a certain displacement relative to the first limiting seat, and the second sliding engagement component can move a certain displacement relative to the second limiting seat. The displacements of the two are perpendicular. Therefore, even if there is radial displacement in the axial direction of the rod, the two sliding engagement components on the intermediate clamp can slide in the first through groove and the second through groove respectively to compensate for the radial displacement of the two axial directions, so as to avoid transmission impact caused by radial error, and avoid damage to threaded holes and other parts caused by transmission bending moment. Therefore, it can avoid the problem of increased clearance due to long-term use of the device.

[0017] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0019] Fig. 1 This is a schematic diagram of the structure of the shut-off valve of the present invention;

[0020] Fig. 2 This is a schematic diagram showing the connection between the limiting card holder and the intermediate clamping plate of the present invention;

[0021] Fig. 3 This is a schematic diagram of the intermediate clamping plate.

[0022] Fig. 4 for Fig. 3 Enlarged view at point A;

[0023] Fig. 5 This is a schematic diagram of the structure of the first sliding fit component;

[0024] Fig. 6 The figure shows the cooperation between the slide rod and the valve seat.

[0025] The figure is marked as follows: valve body 1, valve seat 2, valve assembly 3, valve port 4, through hole 5, lock sleeve 6, sealing rod 7, valve flap 8, first limiting seat 9, intermediate clamping plate 10, second limiting seat 11, transmission rod 12, first through slot 13, second through slot 14, first sliding fit assembly 15, second sliding fit assembly 16, first through slot 17, second through slot 18, center block 19, first spring 20, second spring 21, first sliding block 22, second sliding block 23, spherical embedding groove 24, ball 25, step 26, supporting nail 27, L-shaped support rod 28, sleeve 29, arc plate 30, elastic recovery device 31, pressure sensor 32, extension pipe 33, fixing ring 34, pushing ring 35, filler 36, valve cover 37, slide rod 38, wedge surface 39, groove 40, fourth spring 41. DETAILED DESCRIPTION

[0026] As shown in Figs. 1-6 The present application has a sealing type stop valve with alignment positioning, which comprises a valve body 1, a valve seat 2 cooperating with the valve body 1, and a valve assembly 3 connected with the valve body 1. A water inlet is formed on the side surface of the valve body 1, and the valve seat 2 is arranged at the other end of the valve body 1. A water outlet is formed on the valve seat 2, and the valve assembly 3 is coaxially arranged at the other end of the valve body 1. The valve seat 2 is provided with a valve port 4, which can be closed by the valve assembly 3. A transmission rod 12 is coaxial with the valve port 4. A plurality of through holes 5 are formed on the outer circumference of the valve seat 2 and communicate with the valve port 4. When the valve port 4 is opened, water in the water inlet can enter the valve seat 2 through the through holes 5 and then be discharged through the water outlet on the valve seat 2.

[0027] In the present application, a lock sleeve 6 is arranged on the inner side of the valve seat 2 in axial cooperation. The lock sleeve 6 is fixedly provided with a sealing rod 7 coaxially. When the sealing rod 7 rotates, the lock sleeve 6 can move axially relative to the valve seat 2. The sealing rod 7 is fixedly provided with a valve flap 8 at one end facing the valve port 4. The valve flap 8 is semicircular and has an arc surface that can cooperate with the circular valve port 4 to block it. The valve flap 8 can be made of rubber material to increase the sealing effect. The sealing rod 7 is fixedly provided with a first limiting seat 9 at the other end away from the valve port 4. The first limiting seat 9 is in the shape of a stepped column. The first limiting seat 9 is connected to one end of a second limiting seat 11 through an intermediate clamping plate 10. The other end of the second limiting seat 11 is coaxially connected to one end of a transmission rod 12. The first limiting seat 9 and the second limiting seat 11 are structurally identical, except that the through slots on them are arranged in different directions relative to the intermediate clamping plate 10.

[0028] Specific, transmission rod 12 middle part and valve body 1 threaded connection, when the torque is applied to the transmission rod 12 makes it rotate, transmission rod 12 can be axially moved, then through the card seat and intermediate clamping plate 10 etc. drive sealing rod 7 rotation and axial displacement, through the axial displacement of valve disc 8 to achieve the opening or closing of the valve. Further, the other end of the transmission rod 12, namely away from the second limiting card seat 11 one end of the valve body 1; the extension site can be connected to the handle or motor, etc., can be convenient for control. The end surface of the first limiting card seat 9 is provided with a first through slot 13, the end surface of the second limiting card seat 11 is provided with a second through slot 14, the first through slot 13 and the second through slot 14 are located on the side of the intermediate clamping plate 10, that is, the intermediate clamping plate 10 is clamped between the first limiting card seat 9 and the second limiting card seat 11, the first sliding fit assembly 15 and the second sliding fit assembly 16 are respectively arranged on both sides of the intermediate clamping plate 10, the first sliding fit assembly 15 and the second sliding fit assembly 16 are respectively in sliding fit with the first through slot 13 and the second through slot 14, and the first sliding fit assembly 15 and the second sliding fit assembly 16 are perpendicular to each other. By adopting the arrangement, the two sliding fit assemblies on the intermediate clamping plate 10 can slide in the first through slot 13 and the second through slot 14 respectively to compensate for the two axial radial displacements, so as to avoid the transmission impact caused by the radial error, and the damage to the threaded hole caused by the bending moment of the transmission can be avoided, thereby avoiding the problem of increased gap caused by long-term use of the device.

[0029] In the embodiment, the first sliding groove and the second sliding groove are respectively arranged on the two side surfaces of the intermediate clamping plate 10, and the first sliding groove and the second sliding groove correspond to the first through slot 13 and the second through slot 14 respectively. Under certain conditions, the two sides of the first sliding fit assembly 15 are respectively arranged in sliding fit in the first sliding groove and the first through slot 13, and the two sides of the second sliding fit assembly 16 are respectively arranged in sliding fit in the second sliding groove and the second through slot 14. The first sliding fit assembly 15 and the second sliding fit assembly 16 are the same in structure but perpendicular in arrangement direction. Taking the first sliding fit assembly 15 as an example, the first sliding fit assembly 15 comprises a center block 19, a first spring 20, a second spring 21, a first sliding block 22 and a second sliding block 23. The center block 19 is fixed in the center of the first sliding groove, and the two sides of the center block 19 are connected to the first sliding block 22 and the second sliding block 23 through the first spring 20 and the second spring 21 respectively, and the first sliding block 22 and the second sliding block 23 are arranged in sliding fit in the first sliding groove. By arranging the symmetrical first sliding block 22 and the second sliding block 23 and adopting the elastic sliding connection mode respectively, the sliding fit mode of the sliding block becomes flexible without affecting the fit, the jamming and the wear between the sliding block and the sliding groove or the through slot are reduced, and the service life of the device is improved.

[0030] In the embodiment, the first sliding groove and the first through groove 13 are T-shaped grooves, and the two ends of the first sliding block 22 and the second sliding block 23 are integrally provided with T-shaped protrusions corresponding to the T-shaped grooves. By setting the T-shaped groove and the T-shaped protrusion, the matching effect of sliding can be achieved, and the connection of the limiting clamp and the intermediate clamping plate 10 can also be limited in the axial direction.

[0031] In the embodiment, the center of the first sliding block 22 and the second sliding block 23 is provided with a spherical embedding groove 24, the inner side of the spherical embedding groove 24 is rolling matched with a ball 25, the outer surface of the ball 25 protrudes from the side surface of the first sliding block 22 or the second sliding block 23. The circumference of the first limiting clamp 9 is provided with a step 26, the step 26 is provided with a threaded hole 5, and the threaded hole is matched with a supporting nail 27, the inner end of the supporting nail 27 extends to the side where the first through groove 13 is located and contacts the ball 25. By setting the ball 25, not only the effect of transmitting torque can be achieved, but also the supporting nail 27 contacts the ball 25, the supporting nail can be made of heat-treated material, so as to reduce the wear of the through groove and improve the service life of the device. By setting the supporting nail in a detachable manner, the supporting nail 27 can be replaced at any time to ensure that the device is in an ideal working state at all times, and the product is convenient to maintain.

[0032] In the embodiment, the outer circumference of the intermediate clamping plate 10 is uniformly fixed with a plurality of LL type supporting rods 28, the outer end of the LL type supporting rod 28 is sleeved with a sleeve 29, the outer end of the sleeve 29 is fixed with an arc plate 30, the outer side wall of the arc plate 30 is slidingly matched with the inner wall of the valve body 1 in the circumferential direction, the arc plate 30 and the LL type supporting rod 28 are further connected with an elastic recovery device 31, and the elastic recovery device 31 and the arc plate 30 are further provided with a pressure sensor 32. When the intermediate clamping plate 10 is eccentric relative to the transmission rod 12, the arc plate 30 can be radially displaced relative to the outer end of the LL type supporting rod 28 when the intermediate clamping plate 10 rotates, so that the pressure sensor 32 is subjected to the action of pressure, and when the pressure reaches a threshold value, the pressure sensor 32 alarms, and the device can be adjusted in time. The elastic recovery device 31 adopts a spring, which has an elastic connection effect.

[0033] In the embodiment, the outer side of the transmission rod 12 is connected with an extension pipe 33, the inner side of the extension pipe 33 forms a channel for the transmission rod 12 to pass through, the channel is provided with a fixed ring 34 and a pushing ring 35, the fixed ring 34 and the pushing ring 35 are provided with a filler 36 therebetween, the outer side of the extension pipe 33 is threadedly connected with a valve cover 37, and the inner end of the valve cover 37 is in contact with the pushing ring 35. By setting the valve cover 37, the filler 36 can be compressed. The outer side of the lock sleeve 6 is provided with an external thread, and the inner side of the valve seat 2 is provided with an internal thread matched with the external thread. When the lock sleeve 6 rotates, it can be displaced on the shaft relative to the valve seat 2.

[0034] In the embodiment, the sliding rod 38 is arranged in the through hole 5, the inner end of the sliding rod 38 forms a wedge surface 39 in contact with the valve disc 8, a groove 40 is arranged in the middle of the outer surface of the sliding rod 38, the inner end of the sliding rod 38 can be sealed with the through hole 5, and the fourth spring 41 is connected between the sliding rod 38 and the inner wall of the valve body 1. In the normal water passing condition, the water outside can enter the valve seat 2 through the groove 40 and then be discharged through the valve port 4. When the valve needs to be closed, the valve disc 8 moves axially to the right, the outer surface of the valve disc 8 can act on the wedge surface 39 when the valve port 4 is closed, so that the sliding rod 38 can be displaced along the radial direction, the groove 40 moves outward, and the inner end of the sliding rod 38 is sealed with the through hole 5 at this time, and the through hole 5 is closed to reduce the pressure of the valve disc 8 in the valve seat 2, so as to prevent the valve rod from being bent.

[0035] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A self-aligning, sealing gate valve, comprising a valve body, a valve seat cooperating with the valve body, and a valve assembly connected to the valve body, wherein the valve seat has a valve port that can be closed by the valve assembly, characterized in that: The outer circumference of the valve seat is provided with a plurality of through holes communicated with the valve port, the inner side of the valve seat is provided with a lock sleeve in axial cooperation, the lock sleeve is fixedly provided with a sealing rod coaxially, the sealing rod is fixedly provided with a valve flap at one end towards the valve port, the sealing rod is fixedly provided with a first limiting clamping base at one end away from the valve port, the first limiting clamping base is connected to one end of a second limiting clamping base through an intermediate clamping plate, the other end of the second limiting clamping base is connected to one end of a transmission rod coaxially, the middle part of the transmission rod is threadedly connected with the valve body, the other end of the transmission rod extends out of the valve body; the end surface of the first limiting clamping base is provided with a first through slot, the end surface of the second limiting clamping base is provided with a second through slot, the two sides of the intermediate clamping plate are respectively provided with a first sliding cooperation assembly and a second sliding cooperation assembly, the first sliding cooperation assembly and the second sliding cooperation assembly are respectively in sliding cooperation with the first through slot and the second through slot, and the first sliding cooperation assembly and the second sliding cooperation assembly are perpendicular to each other; a sliding rod is slidably arranged in the through hole, the inner end of the sliding rod forms a wedge surface in contact with the valve flap, a groove is formed in the middle part of the outer surface of the sliding rod, the inner end of the outer side of the sliding rod can form a seal between the through hole, and a fourth spring is connected between the sliding rod and the inner wall of the valve body; under normal water passing condition, water outside can enter the valve seat through the groove, and then be discharged through the valve port, when it is needed to close the valve, the valve flap moves axially to the right, the outer surface of the valve flap can act on the wedge surface when the valve flap closes the valve port, so that the sliding rod can displace along the radial direction, the groove moves outward, and the inner end of the outer side of the sliding rod forms a seal between the through hole at this time, and the through hole is closed at the same time.

2. The sealed globe valve with self-aligning positioning according to claim 1, characterized in that: The two side surfaces of the intermediate clamping plate are respectively provided with a first sliding groove and a second sliding groove, the first sliding groove and the second sliding groove correspond to the first through slot and the second through slot respectively, the first sliding cooperation assembly and the second sliding cooperation assembly are the same in structure but perpendicular in arrangement direction, the first sliding cooperation assembly comprises a center block, a first spring, a second spring, a first sliding block and a second sliding block, the center block is fixed in the center of the first sliding groove, the two sides of the center block are connected to the first sliding block and the second sliding block through the first spring and the second spring respectively, and the first sliding block and the second sliding block are slidably arranged in the first sliding groove.

3. The sealed globe valve with self-aligning positioning according to claim 2, characterized in that: The first sliding groove and the first through slot are T-shaped grooves, and the two ends of the first sliding block and the second sliding block are integrally provided with T-shaped protrusions corresponding to the T-shaped grooves.

4. The sealed globe valve with self-aligning positioning of claim 3, wherein: The center of the first sliding block and the second sliding block is provided with a spherical embedding groove, a rolling ball is rollingly matched with the inner side of the spherical embedding groove, and the outer surface of the rolling ball protrudes from the side surface of the first sliding block or the second sliding block.

5. The sealed globe valve with self-aligning positioning of claim 4, wherein: A step is formed on the circumferential surface of the first limiting clamping base, a threaded through hole is formed in the step, a supporting nail is matched in the threaded through hole, and the inner end of the supporting nail extends to the side of the first through slot and contacts the rolling ball.

6. The sealed globe valve with self-aligning positioning of claim 1, wherein: The outer circumference of the intermediate clamping plate is uniformly fixed with several L-shaped supporting rods, the outer end of the L-shaped supporting rod is sleeved with a sleeve, the outer end of the sleeve is fixed with an arc-shaped plate, the outer side wall of the arc-shaped plate is in circumferential sliding fit with the inner wall of the valve body, the arc-shaped plate and the L-shaped supporting rod are further connected with an elastic recovery device, and the elastic recovery device and the arc-shaped plate are further provided with a pressure sensor.

7. The sealed globe valve with self-aligning positioning of claim 1, wherein: The outer side of the transmission rod is connected with an extension pipe, the inner side of the extension pipe forms a channel for the transmission rod to pass through, a fixing ring and a pushing ring are arranged in the channel, a filler is arranged between the fixing ring and the pushing ring, the outer side of the extension pipe is threadedly connected with a valve cover, and the inner end of the valve cover is in contact with the pushing ring.

8. The sealed globe valve with self-aligning positioning of claim 1, wherein: The outer side of the lock sleeve is provided with external threads, and the inner side of the valve seat is provided with internal threads matched with the external threads.

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