Dual-acting valve seat replaceable seal ball valve

Abstract

The application provides a double-moving valve seat replaceable sealing ball valve, relates to the field of ball valves, and comprises a valve body, flange plates arranged at two ends of the valve body respectively, and a threaded column arranged on the valve body. In order to solve the problem that long-term use of the ball valve causes continuous extrusion between the ball core and the valve seat, the valve seat is irreversibly abraded, and the sealing property of the ball valve is reduced, the connecting mechanism is arranged, the valve seat damaged on one side is replaced, the whole valve body and the flange plate do not need to be disassembled and reassembled, the maintenance workload and complexity are reduced, the downtime of the system is reduced, the situation that the sealing property is reduced due to the abrasion of the valve seat is prevented, the connecting mechanism is arranged, the problem that the sealing performance is low due to the linear fitting of the valve seat and the sealing ball in the prior art is solved, the connecting mechanism is arranged, and the problem that the practicality of the valve seat is low due to the single pre-pressure of the disc spring in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ball valves, in particular to a replaceable sealing ball valve with double movable valve seat. BACKGROUND

[0002] The replaceable sealing ball valve with double movable valve seat is a high-performance valve mainly used in industrial scenarios that require high sealing performance, bidirectional sealing, and frequent maintenance or replacement of sealing elements. In the use of existing ball valves, the ball core port is constantly pressed against the valve seat, which causes irreversible wear of the valve seat over a long period of use, resulting in an increase in the gap between the valve seat and the ball core, and thus reducing the sealing performance of the ball valve.

[0003] For example, the "double movable valve seat structure of a floating ball valve and ball valve" disclosed in Chinese invention patent (application number: 202310142066.3) has the following description in the specification: During the use of the ball valve, the ball core port is constantly pressed against the valve seat, which causes irreversible wear of the valve seat over a long period of use, further affecting the cooperation between the valve seat and the ball core, resulting in a gap between the two, which can cause leakage during the use of the ball valve, and thus reduce the performance of the ball valve. The above-mentioned patent can prove the defects existing in the prior art.

[0004] Therefore, we improve it and propose a replaceable sealing ball valve with double movable valve seat. SUMMARY

[0005] The purpose of the present application is to solve the problem that the long-term use of the ball valve causes the ball core to constantly press against the valve seat, resulting in irreversible wear of the valve seat, and thus reducing the sealing performance of the ball valve.

[0006] In order to achieve the above-mentioned purpose of the application, the present application provides a replaceable sealing ball valve with double movable valve seat to improve the above-mentioned problems.

[0007] The present application is as follows:

[0008] It comprises a valve body, flange plates arranged at both ends of the valve body respectively, a threaded column arranged on the valve body, a nut threadedly connected to the threaded column, a rotating shaft arranged on the valve body, a sealing ball arranged on the rotating shaft, a valve stem arranged on the rotating shaft, and a connecting mechanism arranged on the flange plate.

[0009] The connecting mechanism comprises a disc spring slidingly arranged on the flange plate, a transmission seat slidingly arranged on the flange plate, a limiting groove arranged on the transmission seat, a limiting block slidingly arranged in the limiting groove, and a valve seat arranged on the limiting block.

[0010] The transmission seat is provided with a sliding column, the sliding column is provided with a ball, and the flange plate is provided with a threaded groove.

[0011] The valve seat and the sealing ball are matched, the ball is slidably arranged on the threaded groove, the disc spring and the transmission seat are matched, and the flange plate is slidably arranged on the threaded column.

[0012] The transmission seat is provided with a cavity, the sliding column is slidably arranged in the cavity, the sliding column is provided with a clamping groove, the transmission seat is provided with a sliding groove, and the sliding groove is slidably provided with a jacking block.

[0013] The end of the jacking block is wedge-shaped, and the end of the jacking block and the clamping groove are matched.

[0014] The bottom of the sliding column is provided with a disc, the disc is slidably arranged on the cavity, the outer side of the sliding column is provided with a spring, and the two ends of the spring are arranged on the corresponding surfaces of the disc and the cavity respectively.

[0015] The valve seat and the sliding column are matched, and the end of the sliding groove is in the shape of a circular truncated cone.

[0016] The flange plate is provided with a driving groove, the driving groove is slidably provided with a driving ring, the driving ring and the disc spring are matched, the flange plate is rotatably provided with a threaded rod, and the driving ring is threadedly connected to the threaded rod.

[0017] The threaded rod is provided with a knob, the driving groove is provided with a guide column, and the driving ring is slidably arranged on the guide column.

[0018] The flange plate is provided with a scale.

[0019] Compared with the prior art, the application has the following beneficial effects:

[0020] In the scheme of the application:

[0021] 1. In order to solve the problem that the ball core and the valve seat are continuously extruded, the valve seat is irreversibly worn, and the sealing performance of the ball valve is reduced, the connecting mechanism is arranged, the valve seat damaged on one side is replaced, the whole valve body and the flange plate do not need to be disassembled and reassembled, the maintenance workload and complexity are reduced, the downtime of the system is reduced, and the sealing performance is prevented from being reduced due to the wear of the valve seat.

[0022] 2. Through the connecting mechanism arranged, the close-fitting between the valve seat and the sealing ball can be made more closely by rotating the sealing ball to close-fitting the valve seat, the micro gap caused by the straight-line close-fitting of the prior art is reduced, the sealing performance is improved, and the problem of low sealing performance caused by the straight-line close-fitting of the valve seat to seal the ball in the prior art is solved.

[0023] 3. Through the connecting mechanism arranged, by adjusting the pre-pressure of the disc spring on the valve seat, stable sealing performance can be maintained under different working conditions, the practicability of the device is improved, and the problem of low practicability of the valve seat caused by the single pre-pressure of the disc spring in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The structure schematic diagram of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure.

[0025] Figure 2 The flange plate two-dimensional structure schematic diagram of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure.

[0026] Figure 3 The valve body internal structure schematic diagram of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure.

[0027] Figure 4 The valve body internal explosion structure schematic diagram of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure.

[0028] Figure 5 The transmission seat sectional structure schematic diagram of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure. Figure 4 The enlarged structure schematic diagram of area A of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure.

[0029] Figure 6 The transmission seat sectional structure schematic diagram of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure.

[0030] Figure 7 The enlarged structure schematic diagram of area B of the double movable valve seat replaceable sealing ball valve provided by the application is shown in the figure. Figure 6

[0031] Indicated in the figure:

[0032] 1, valve body; 101, flange plate; 102, threaded column; 103, nut; 104, rotating shaft; 105, sealing ball; 106, valve stem;

[0033] ​2, connecting mechanism; 201, disc spring; 202, transmission seat; 203, limiting groove; 204, limiting block; 205, valve seat; 206, sliding column; 207, ball; 208, threaded groove; 209, cavity; 210, clamping groove; 211, sliding groove; 212, jacking block; 213, disc; 214, spring; 215, driving groove; 216, driving ring; 217, threaded rod; 218, knob; 219, guide column; 220, scale. DETAILED DESCRIPTION

[0034] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0035] As described in the background, long-term use of the ball valve will cause the ball core and the valve seat to be continuously extruded, so that the valve seat is irreversibly worn, and thus the sealing property of the ball valve is reduced.

[0036] In order to solve this technical problem, the present application provides a double-moving valve seat replaceable sealing ball valve, which is applied to a ball valve.

[0037] Specifically, please refer to Figures 1-7 As shown in the figure, the double-moving valve seat replaceable sealing ball valve specifically comprises a valve body 1, flange plates 101 respectively arranged at both ends of the valve body 1, threaded columns 102 arranged on the valve body 1, nuts 103 threadedly connected to the threaded columns 102, rotating shafts 104 rotatably arranged on the valve body 1, sealing balls 105 arranged on the rotating shafts 104, valve stems 106 arranged on the rotating shafts 104, and connecting mechanisms 2 arranged on the flange plates 101. In the prior art, the flange plates 101 and the valve body 1 are fixed together through the cooperation of the nuts 103 and the threaded columns 102, and the opening and closing of the sealing balls 105 are realized through the rotation of the valve stems 106. A through hole is formed on the sealing ball 105, and the existing through hole is used to transmit fluid, such as Figure 3 As shown in the figure, the state is the opening state of the sealing ball 105. When the sealing ball 105 is rotated by 90 degrees, the sealing ball 105 blocks the valve body 1. The disc spring 201 can provide an initial pre-pressure to ensure that the valve seat 205 and the sealing ball 105 can maintain a certain contact force without fluid pressure;

[0038] The connecting mechanism 2 comprises a disc spring 201 slidingly arranged on the flange plate 101, a transmission seat 202 slidingly arranged on the flange plate 101, a limiting groove 203 arranged on the transmission seat 202, a limiting block 204 slidingly arranged on the limiting groove 203, and a valve seat 205 arranged on the limiting block 204.

[0039] The double movable valve seat 205 can replace the sealing ball 105 valve, so as to solve the problem that the ball core is continuously extruded with the valve seat 205, the valve seat 205 is irreversibly worn, and the sealing performance of the ball valve is reduced.

[0040] The connecting mechanism 2 can make the sealing ball 105 and the valve seat 205 more closely adhere to each other by rotating the valve seat 205 to adhere to the sealing ball 105, so as to reduce the small gap caused by the linear sliding adhesion of the existing valve seat 205, improve the sealing performance, and solve the problem that the linear adhesion of the valve seat 205 to the sealing ball 105 causes low sealing performance.

[0041] The connecting mechanism 2 can adjust the pre-pressure of the disc spring 201 on the valve seat 205, so as to ensure stable sealing performance under different working conditions, improve the practicability of the device, and solve the problem that the single pre-pressure of the disc spring 201 causes low practicability of the valve seat 205.

[0042] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings.

[0043] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0044] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0045] Embodiment 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, a double-acting valve seat replaceable sealing ball valve is provided with a sliding column 206 on the transmission seat 202, a ball 207 is rotatably arranged on the sliding column 206, and a threaded groove 208 is arranged on the flange plate 101;

[0046] In use, the nut 103 is rotated to disengage the threaded column 102, at which time the limit between the flange plate 101 and the valve body 1 is released, at which time the flange plate 101 is separated from the valve body 1, as shown Figure 6 As shown, the valve seat 205 is driven to displace upward, and the limiting block 204 on the valve seat 205 slides upward along the limiting groove 203, at which time the limiting block 204 and the limiting groove 203 are disengaged, and the valve seat 205 and the transmission seat 202 are disengaged, thereby allowing the valve seat 205 to be quickly replaced, which can reduce the maintenance time of the valve body 1, thereby reducing the downtime of the system, preventing the valve seat 205 from being worn to reduce the sealing performance, and fixing the threaded column 102 on the valve body 1, when the valve seat 205 on one side of the valve body 1 is damaged, the nut 103 on one side is rotated to realize the targeted replacement of the valve seat 205 on one side, so that the entire valve body 1 and the flange plate 101 do not need to be disassembled and reassembled, thereby reducing the maintenance workload and complexity;

[0047] Further, the valve seat 205 and the sealing ball 105 are adapted, the ball 207 is slidably arranged on the threaded groove 208, the disc spring 201 and the transmission seat 202 are adapted, and the flange plate 101 is slidably arranged on the threaded column 102;

[0048] When the valve seat 205 and the sealing ball 105 are in contact, the transmission seat 202 is pushed by the disc spring 201, the sliding column 206 on the transmission seat 202 and the ball 207 are synchronously displaced, the ball 207 slides along the threaded groove 208, at which time the transmission seat 202 slides and rotates, the valve seat 205 and the transmission seat 202 are synchronously displaced, and the valve seat 205 rotates to contact the sealing ball 105 when the valve seat 205 contacts the sealing ball 105, compared to the existing valve seat 205 which linearly slides and contacts the sealing ball 105, the rotation contact has dynamic adjustment capability, the valve seat 205 can automatically adjust the contact point through rotational motion, better adapting to the shape of the sealing ball 105, the rotation contact can make the valve seat 205 and the sealing ball 105 contact more closely, reducing the small gap caused by linear sliding contact, thereby improving the sealing performance;

[0049] Further, the transmission seat 202 is provided with a cavity 209, the sliding column 206 is slidably arranged in the cavity 209, the sliding column 206 is provided with a clamping groove 210, the transmission seat 202 is provided with a sliding groove 211, and a jacking block 212 is slidably arranged in the sliding groove 211;

[0050] As shown Figure 7As shown, the top block 212 is inserted into the sliding groove 211 and the clamping groove 210, and at this time the sliding column 206 is limited on the transmission seat 202, and at this time the ball 207 and the threaded groove 208 are matched, and the transmission seat 202 cannot be separated from the flange plate 101. When it is necessary to replace the disc spring 201, the top block 212 is pulled out, and the top block 212 is separated from the limiting of the sliding column 206. At this time, the sliding column 206 can slide along the cavity 209. At this time, the ball 207 is separated from the threaded groove 208. At this time, the transmission seat 202 can be taken out from the flange plate 101. In this way, the disc spring 201 can be taken out and replaced. When the valve seat 205 is replaced, the corresponding flange plate 101 is separated from the valve body 1. The transmission seat 202 and the disc spring 201 in the flange plate 101 are retained on the flange plate 101. The valve seat 205 is directly slid upward, so that the limiting block 204 is separated from the limiting groove 203, and the valve seat 205 is replaced quickly. Through this way, the internal parts of the flange plate 101 and the valve body 1 will not affect the replacement of the valve seat 205, so that the replacement operation of the valve seat 205 is convenient, the dependence on professional tools and skills is reduced, and the maintenance convenience is improved;

[0051] Further, the end of the top block 212 is wedge-shaped, and the end of the top block 212 is matched with the clamping groove 210. The wedge-shaped end of the top block 212 can be quickly matched with the clamping groove 210.

[0052] Further, the bottom of the sliding column 206 is provided with a disc 213, and the disc 213 is slidably arranged in the cavity 209. The outer side of the sliding column 206 is provided with a spring 214, and the two ends of the spring 214 are arranged on the corresponding surfaces of the disc 213 and the cavity 209 respectively. When the top block 212 is separated from the limiting of the sliding column 206, Figure 7 As shown, the spring 214 drives the disc 213 to displace upward. At this time, the sliding column 206 and the ball 207 displace upward synchronously. The ball 207 displaces upward and is separated from the matching of the threaded groove 208. At this time, the transmission seat 202 can be taken out from the flange plate 101. The threaded groove 208 plays a limiting role on the transmission seat 202;

[0053] Further, the valve seat 205 is matched with the sliding column 206, and the end of the sliding groove 211 is in the shape of a circular truncated cone. When the limiting block 204 on the valve seat 205 is clamped with the limiting groove 203 of the transmission seat 202, Figure 7 As shown, the valve seat 205 limits the top block 212. When it is necessary to pull out the top block 212, the valve seat 205 needs to be separated from the transmission seat 202. The end of the sliding groove 211 is in the shape of a circular truncated cone, so that the area of the end of the top block 212 exposed outside when contacting the valve seat 205 is increased. In this way, the staff can manually pull it out;

[0054] The single-side damaged valve seat 205 is replaced by the connecting mechanism 2, so that the whole valve body 1 and the flange plate 101 do not need to be disassembled and reassembled, the maintenance workload and complexity are reduced, the downtime of the system is reduced, the situation that the sealing performance is reduced due to the wear of the valve seat 205 is prevented, the contact between the valve seat 205 and the sealing ball 105 is more closely through the rotation of the valve seat 205, the small gap caused by the existing linear sliding contact is reduced, and the sealing performance is improved.

[0055] In the embodiment 2, the sealing ball valve with the double movable valve seat is further optimized, and specifically, as shown in Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the flange plate 101 is provided with a driving groove 215, the driving ring 216 is slidably arranged on the driving groove 215, the driving ring 216 is matched with the disc spring 201, the threaded rod 217 is rotatably arranged on the flange plate 101, and the driving ring 216 is threadedly connected to the threaded rod 217.

[0056] As shown in Figure 3 , when the threaded rod 217 is rotated, the threaded rod 217 is rotated and drives the driving ring 216 to slide along the driving groove 215, the driving ring 216 extrudes the disc spring 201, and then the valve seat 205 is more closely contacted with the sealing ball 105, the pre-pressing force of the disc spring 201 on the valve seat 205 is adjusted, stable sealing performance under different working conditions is ensured, and the practicability of the device is improved.

[0057] Further, the threaded rod 217 is provided with a knob 218, the driving groove 215 is provided with a guide column 219, the driving ring 216 is slidably arranged on the guide column 219, the knob 218 drives the threaded rod 217 to rotate by rotating the knob 218, and the guide column 219 is used for guiding the driving ring 216.

[0058] Further, the flange plate 101 is provided with a scale 220, the knobs 218 on both sides of the flange plate 101 are rotated and positioned at the same scale 220, so that the contact forces of the valve seats 205 on both sides of the valve body 1 on the sealing ball 105 are the same.

[0059] The pre-pressing force of the disc spring 201 on the valve seat 205 is adjusted by the connecting mechanism 2, stable sealing performance under different working conditions is ensured, and the practicability of the device is improved.

[0060] The use process of the sealing ball valve with the double movable valve seat provided by the application is as follows:

[0061] In use, when the valve seat 205 on one side of the valve body 1 is damaged, the screw cap 103 is unscrewed from the threaded column 102 by rotating the screw cap 103, so that the limit between the flange plate 101 and the valve body 1 is released, the limit block 204 on the valve seat 205 is synchronously upwardly slid along the limit slot 203 by driving the valve seat 205 to displace upwardly, the limit block 204 and the limit slot 203 are disengaged, and then the valve seat 205 and the transmission seat 202 are disengaged from the limit, so that the valve seat 205 can be quickly and specifically replaced, when the valve seat 205 and the sealing ball 105 are attached, the transmission seat 202 is pushed by the disc spring 201, the sliding column 206 on the transmission seat 202 and the ball 207 are synchronously displaced, the ball 207 is slid along the threaded slot 208, the transmission seat 202 is slid and rotated, the valve seat 205 and the transmission seat 202 are synchronously displaced, so that the valve seat 205 is rotated and attached to the sealing ball 105, the threaded rod 217 is rotated by rotating the knob 218, the threaded rod 217 is rotated and drives the driving ring 216 to slide along the guide column 219, the driving ring 216 extrudes the disc spring 201, so that the valve seat 205 is more closely attached to the sealing ball 105, the pre-pressure of the disc spring 201 on the valve seat 205 is adjusted to ensure that stable sealing performance can be maintained under different working conditions, when the disc spring 201 needs to be replaced, the sliding column 206 is disengaged from the limit by pulling out the jacking block 212, the spring 214 drives the disc 213 to displace upwardly, the sliding column 206 and the ball 207 are synchronously displaced upwardly, the ball 207 is upwardly displaced and disengaged from the adaptation of the threaded slot 208, the limit of the threaded slot 208 on the transmission seat 202 is released, so that the transmission seat 202 can be taken out from the flange plate 101, and then the disc spring 201 can be taken out and replaced.

[0062] In the present application, unless specifically defined otherwise or the context clearly dictates otherwise, the terms "mounting", "connected", "connecting", "fixed", and like terms should be construed in a broad manner, for example, can be fixed connection, can be detachable connection, or integrated; can be mechanical connection, or electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] Obviously, the above-described embodiments are only some embodiments but not all the embodiments of the present application, the preferred embodiments of the present application are shown in the drawings, but do not limit the patent scope of the present application. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or make equivalent replacements to some technical features therein. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A double-acting valve seat replaceable sealing ball valve, comprising a valve body (1), a flange plate (101) arranged at both ends of the valve body (1) respectively, a threaded column (102) arranged on the valve body (1), a nut (103) threadedly connected on the threaded column (102), a rotating shaft (104) arranged on the valve body (1) in rotation, a sealing ball (105) arranged on the rotating shaft (104), a valve stem (106) arranged on the rotating shaft (104), characterized in that The connecting mechanism (2) is arranged on the flange plate (101); The connecting mechanism (2) comprises a disc spring (201) slidingly arranged on the flange plate (101), a transmission seat (202) slidingly arranged on the flange plate (101), a limiting groove (203) arranged on the transmission seat (202), a limiting block (204) slidingly arranged in the limiting groove (203), and a valve seat (205) arranged on the limiting block (204). A sliding column (206) is arranged on the transmission seat (202), a ball (207) is rotatably arranged on the sliding column (206), and a threaded groove (208) is arranged on the flange plate (101). The valve seat (205) is matched with the sealing ball (105), the ball (207) is slidingly arranged in the threaded groove (208), the disc spring (201) is matched with the transmission seat (202), and the flange plate (101) is slidingly arranged on the threaded column (102). A cavity (209) is arranged in the transmission seat (202), the sliding column (206) is slidingly arranged in the cavity (209), a clamping groove (210) is arranged on the sliding column (206), a sliding groove (211) is arranged on the transmission seat (202), and a jacking block (212) is slidingly arranged in the sliding groove (211). The end of the jacking block (212) is matched with the clamping groove (210). A disc (213) is arranged at the bottom of the sliding column (206), the disc (213) is slidingly arranged on the cavity (209), a spring (214) is arranged outside the sliding column (206), and the two ends of the spring (214) are arranged on the corresponding surfaces of the disc (213) and the cavity (209) respectively.

2. A double-ported replaceable seated ball valve according to claim 1, wherein, The end of the jacking block (212) is wedge-shaped.

3. A double-ported replaceable seated ball valve according to claim 2, wherein, The valve seat (205) is matched with the sliding column (206), and the end of the sliding groove (211) is in the shape of a circular truncated cone.

4. A double-ported replaceable seated ball valve according to claim 3, wherein, A driving groove (215) is arranged on the flange plate (101), a driving ring (216) is slidingly arranged in the driving groove (215), the driving ring (216) is matched with the disc spring (201), a threaded rod (217) is rotatably arranged on the flange plate (101), and the driving ring (216) is threadedly connected to the threaded rod (217).

5. A double-ported replaceable seated ball valve according to claim 4, wherein, A knob (218) is arranged on the threaded rod (217), a guide column (219) is arranged in the driving groove (215), and the driving ring (216) is slidingly arranged on the guide column (219).

6. A dual-ported replaceable seat sealed ball valve according to claim 5, wherein, A scale (220) is arranged on the flange plate (101).

Images