Stop valve

Abstract

The stop valve comprises a valve body, an actuator and a valve rod connected with the actuator, the valve body is provided with an inflow cavity on the left side of the valve rod, the valve body is provided with an outflow cavity on the right side of the valve rod, the length direction of the valve rod extends up and down, and the valve rod is located between the inflow cavity and the outflow cavity. The valve body comprises an upper connecting part and a lower connecting part which are detachably connected, the inflow cavity and the outflow cavity are both located in the lower connecting part, the matching seat is detachably connected with the lower connecting part, a left channel is formed in the portion, located on the left side of the valve rod, in the matching seat, and a right channel is formed in the portion, located on the right side of the valve rod, of the matching seat; the valve rod is provided with a transmission channel communicated with the left channel and the right channel, the left channel is communicated with the inflow cavity, and the right channel is communicated with the outflow cavity. According to the stop valve, the valve rod moves downwards to be in contact with the matching seat, so that the situation that the valve body is abraded due to the fact that the valve rod moves up and down is avoided.

Description

Technical Field

[0001] The utility model relates to a stop valve, in particular to a stop valve. Background Art

[0002] Globe valves, also known as stop valves, are one of the most widely used valves. Their popularity stems from their low friction between the sealing surfaces during opening and closing, their durability, low opening height, ease of manufacture, and convenient maintenance. They are suitable for both low and medium pressures, as well as high pressures. Globe valves close by relying on stem pressure to force the disc sealing surface into close contact with the seat, preventing the flow of media.

[0003] As the valve stem is continuously forced to move up and down, the downward valve stem will continuously exert pressure on the valve body that cooperates with it, causing wear and tear on the valve body, which allows liquid to flow and leak in the closed state.

[0004] Therefore, how to increase the service life of the portion of the valve body that contacts the valve stem, thereby reducing the occurrence of liquid leakage, has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a stop valve that prevents the valve stem from moving up and down and causing wear on the valve body by moving the valve stem downward so that the valve stem contacts a mating seat.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: including a valve body, an actuator and a valve stem connected to the actuator, the valve body is provided with an inflow chamber on the left side of the valve stem, the valve body is provided with an outflow chamber on the right side of the valve stem, the length direction of the valve stem extends up and down and is located between the inflow chamber and the outflow chamber, and also includes a mating seat located between the inflow chamber and the outflow chamber, the valve body includes a detachable upper connecting part and a lower connecting part, the inflow chamber and the outflow chamber are both located in the lower connecting part, the mating seat is detachably connected to the lower connecting part, a left channel is provided in the mating seat on the left side of the valve stem, a right channel is provided on the right side of the valve stem, a transfer channel is provided on the valve stem that is interconnected with the left channel and the right channel, the left channel is interconnected with the inflow chamber, and the right channel is interconnected with the outflow chamber, and the valve body is made of chromium-molybdenum-vanadium steel.

[0007] The utility model is further configured such that: the transmission channel is arranged to be inclined from top to bottom and from left to right.

[0008] The utility model is further configured as follows: the left channel includes a left inlet at the bottom, the right channel includes a right inlet on the right side, the left inlet is flared from top to bottom, and the right inlet is flared from left to right.

[0009] The utility model is further configured as follows: a mounting plug-in is provided in the mating seat and is in contact with the bottom of the valve stem and is made of a flexible material; springs are compressed on both sides of the left and right sides of the mounting plug-in; one end of each spring is fixedly connected to the mating seat, and the other end is fixedly connected to the mounting plug-in.

[0010] The present invention is further configured to include a sealing seat located above the mating seat, the sealing seat including a head and an inserting portion located below the head, the bottom surface of the head abuts against the top of the mating seat, the inserting portion is inserted into the mating seat and abuts against the inner wall of the mating seat in the circumferential direction.

[0011] The present invention is further configured as follows: the upper connecting part is provided with a positioning plug made of a material that is easy to deform and protrudes downward, the lower connecting part is provided with a positioning slot corresponding to the positioning plug, the positioning plug is recessed inwardly and provided with a matching slot, and the lower connecting part is provided with a matching plug in the positioning slot.

[0012] The present invention is further configured as follows: the lower connecting portion is provided with connecting plugs on both sides of the left and right sides of the positioning slot, and the upper connecting portion is provided with connecting slots corresponding to the connecting plugs.

[0013] By adopting the above technical solution, 1. Since the mating seat is detachably connected to the lower connecting part, when the actuator is started to drive the valve stem to move up and down, the bottom of the valve stem moves in the mating seat, and when the valve stem is downward and contacts the mating seat to apply a downward force to it, since the mating seat is made of a material that is easy to deform, the wear of the mating seat is reduced in the process of the mating seat being subjected to the downward force of the valve stem, thereby extending the service life of the stop valve; 2. After the actuator is started to drive the valve stem to move upward, the liquid flowing into the cavity can enter through the left channel and enter the transfer channel, and then the liquid flows out of the outflow cavity through the right channel; 3. Since the mating seat is detachably connected to the lower connecting part and the upper connecting part is detachably connected to the lower connecting part, when the mating seat is worn and needs to be replaced, the mating seat can be removed and replaced by separating the upper connecting part from the lower connecting part and then separating the mating seat from the lower connecting part. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A cross-sectional view of a specific embodiment of the present utility model;

[0016] Figure 2 for Figure 1 A magnified view of middle A;

[0017] Figure 3 for Figure 1 Enlarged view of middle B;

[0018] Figure 4 for Figure 1 Enlarged view of C in the middle.

[0019] In the figure: 1-valve body, 11-inflow chamber, 12-outflow chamber, 13-upper connecting portion, 131-positioning plug, 1311-matching slot, 132-connecting slot, 14-lower connecting portion, 141-positioning slot, 142-connecting plug, 15-matching plug;

[0020] 2-Actuator;

[0021] 3-valve stem, 31-transmission channel;

[0022] 4-matching seat, 41-left channel, 411-left inlet, 42-right channel, 421-right inlet, 43-installing plug, 431-spring, 44-sealing seat, 441-head, 442-insertion part. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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] like Figure 1-Figure 4As shown, the utility model discloses a stop valve, including a valve body 1, an actuator 2 and a valve stem 3 connected to the actuator 2. The valve body 1 is provided with an inflow chamber 11 on the left side of the valve stem 3, and the valve body 1 is provided with an outflow chamber 12 on the right side of the valve stem 3. The length direction of the valve stem 3 extends up and down and is located between the inflow chamber 11 and the outflow chamber 12. In this embodiment, the actuator 2 can be a motor, which drives the valve stem 3 with a thread arranged circumferentially to move by the rotation of the motor, or it can be other devices that can drive the valve stem 3 to move up and down (the principle and wiring method are both existing technologies and will not be elaborated in detail here). The actuator 2 can drive the valve stem 3 to move up and down. After starting the actuator 2, the valve stem 3 is driven to move upward. At this time, the valve stem 3 moves upward from the position between the inflow chamber 11 and the outflow chamber 12, and the inflow chamber 11 and the outflow chamber 12 are connected to each other, so that the liquid in the inflow chamber 11 can move toward the outflow chamber 12, and when the valve stem 3 is moved downward by the actuator 2, the valve stem 3 plays a role in cutting off the communication between the inflow chamber 11 and the outflow chamber 12. Therefore, it is difficult for the liquid in the inflow chamber 11 to cross the valve stem 3 and enter the outflow chamber 12. The valve body 1 also includes a matching seat 4 made of a deformable material such as rubber located between the inflow chamber 11 and the outflow chamber 12. The valve body 1 includes an upper connecting portion 13 and a lower connecting portion 14 that are detachably connected by bolts or the like. The inflow chamber 11 and the outflow chamber 12 are both located in the lower connecting portion 14, and the matching seat 4 is connected to the lower connecting portion 14. The valve stem 3 is detachably connected to the matching seat 4 by bolts or the like. A left channel 41 is provided in the matching seat 4 on the left side of the valve stem 3. A right channel 42 is provided in the matching seat 4 on the right side of the valve stem 3. A transfer channel 31 is provided on the valve stem 3 that is in communication with the left channel 41 and the right channel 42. The left channel 41 is in communication with the inflow chamber 11, and the right channel 42 is in communication with the outflow chamber 12. The valve body 1 is made of chromium-molybdenum-vanadium steel. 1. Since the matching seat 4 is detachably connected to the lower connecting portion 14, when the actuator 2 is started and the valve stem 3 is driven to move up and down, the bottom of the valve stem 3 moves in the matching seat 4. When the valve stem 3 is downward and contacts the matching seat 4 to apply a downward force to it, at this time, since the matching seat 4 is easily 1. It is made of a deformable material, so the wear of the mating seat 4 is reduced when the mating seat 4 is subjected to the downward force of the valve stem 3, thereby extending the service life of the stop valve; 2. After the actuator 2 is started to drive the valve stem 3 to move upward, the liquid flowing into the chamber 11 can enter through the left channel 41 and enter the transfer channel 31, and then the liquid flows out of the outflow chamber 12 through the right channel 42; 3. Since the mating seat 4 and the lower connecting part 14 are detachably connected and the upper connecting part 13 and the lower connecting part 14 are detachably connected, when the mating seat 4 is worn and needs to be replaced, the upper connecting part 13 is separated from the lower connecting part 14 and then the mating seat 4 is separated from the lower connecting part 14, so that the mating seat 4 can be taken out and replaced.

[0025] Preferably, the transfer channel 31 is tilted from left to right from top to bottom. After the actuator 2 is started to drive the valve stem 3 to move upward, the liquid flowing into the chamber 11 can enter the top of the left channel 41 and then be at the same height as the left side of the transfer channel 31. At this time, as the liquid flowing into the chamber 11 moves toward the left channel 41, the liquid on the right side of the left channel 41 is subjected to the pressure exerted by the flowing liquid on the left and enters the transmission channel. Because the transfer channel 31 is tilted from left to right from top to bottom, the liquid entering the transfer channel 31 can flow downward due to its own gravity, that is, enter the right channel 42. Therefore, the tilted transfer channel 31 can enable the liquid to smoothly enter the right channel 42.

[0026] Preferably, the left channel 41 includes a left inlet 411 at the bottom, and the right channel 42 includes a right inlet 421 on the right side. The left inlet 411 is flared from top to bottom, and the right inlet 421 is flared from left to right. Since the left inlet 411 is flared and the right inlet 421 is flared, the liquid entering the left channel 41 from the inflow chamber 11 will first enter the bottom of the left inlet 411, that is, the place with the largest radius, and then enter the left inlet 411 more smoothly and quickly. Similarly, the liquid flowing from the right channel 42 to the outflow chamber 12 will enter the rightmost side of the right inlet 421, that is, the place with the largest radius, when leaving the right inlet 421, and then enter the outflow chamber 12 more smoothly and quickly.

[0027] Among them, the matching seat 4 is provided with a mounting plug 43 which is in contact with the bottom of the valve stem 3 and is made of a flexible material such as rubber. The left and right sides of the mounting plug 43 are compressed with springs 431. One end of each spring 431 is fixedly connected to the matching seat 4 by welding or the like, and the other end is fixedly connected to the mounting plug 43 by welding or the like. Due to the presence of the mounting plug 43 and the spring 431, when the actuator 2 is started to move the valve stem 3 downward, the matching seat 4 can move downward, driving the spring 431 to be compressed, thereby making the left channel 41 , the right channel 42 can be connected to the transfer channel 31 so that the liquid in the inflow chamber 11 flows out from the outflow chamber 12. When the inflow chamber 11 and the outflow chamber 12 are cut off, that is, the valve stem 3 moves upward, at this time, as the valve stem 3 moves upward, the transfer channel 31 and the left channel 41 and the right channel 42 are staggered, and the elastic force of the spring 431 will drive the installation block 43 to move upward. At this time, due to the upward movement of the installation block 43, it will resist the bottom of the valve stem 3, making it difficult for the liquid in the left channel 41 to cross the space where the valve stem 3 is located and flow to the right channel 42.

[0028] Among them, it also includes a sealing seat 44 located above the mating seat 4, and the sealing seat 44 includes a head 441 and an inserting portion 442 located below the head 441. The bottom surface of the head 441 is against the top of the mating seat 4, and the inserting portion 442 is inserted into the mating seat 4 and is circumferentially against the inner wall of the mating seat 4. Since the head 441 of the sealing seat 4 is against the top of the mating seat 4, and the circumference of the inserting portion 442 is against the inner wall of the mating seat 4, the sealing seat 44 always sleeves the valve stem 3 during the process of starting the actuator 2 and driving the valve stem 3 to move up and down, so the liquid moving from the inflow chamber 11 toward the outflow chamber 12 will not cross the sealing seat 44 and enter the top cavity of the lower connecting portion 14, thereby improving the sealing performance between the valve stem 3 and the lower connecting portion 14 when moving.

[0029] Among them, the upper connecting part 13 is provided with a positioning plug 131 made of a deformable material protruding downward, and the lower connecting part 14 is provided with a positioning slot 141 corresponding to the positioning plug 131. The positioning plug 131 is recessed inwardly and provided with a matching slot 1311. The lower connecting part 14 is provided with a matching plug 43 in the positioning slot 141. Since the portion of the positioning plug 131 below the matching slot 1311 will first contact the matching plug 43 when entering the positioning slot 141 during the process of installing the upper connecting part 13 onto the upper part of the lower connecting part 14, 3. At this time, the positioning plug 131 needs to be forced downward to pass over the mating plug 43 so that the mating plug 43 is mated with the mating slot 1311. Therefore, the upper connecting portion 13 and the lower connecting portion 14 can be stably installed together without the action of external force. When it is necessary to separate the upper connecting portion 13 and the lower connecting portion 14 to inspect the mating seat 4, an upward force is applied to the positioning plug 131 so that the mating slot 1311 can be forced upward to pass over the mating plug 43, so that the positioning plug 131 is separated from the positioning slot 141 and can contact the mating seat 4.

[0030] Preferably, the lower connecting portion 14 is provided with connecting blocks 142 on both sides protruding from the left and right sides of the positioning slot 141, and the upper connecting portion 13 is provided with connecting slots 132 corresponding to each connecting block 142. Due to the provision of each connecting block 142, after the connection between the upper connecting portion 13 and the lower connecting portion 14 is completed, due to the provision of the sealing seat 44, the liquid flowing into the cavity 11 toward the outflow cavity 12 will not leak upward. If the sealing seat 44 is worn, the liquid flowing toward the connection between the upper connecting portion 13 and the lower connecting portion 14 will be blocked by each connecting block 142 before leaking out of the valve body 1 through the positioning block 131 and the positioning slot 141, thereby further improving the sealing performance of the valve body 1.

[0031] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stop valve comprising a valve body, an actuator, and a valve stem connected to the actuator, wherein the valve body is provided with an inflow chamber on the left side of the valve stem, and the valve body is provided with an outflow chamber on the right side of the valve stem, and the length of the valve stem extends vertically and is located between the inflow chamber and the outflow chamber, characterized in that: It also includes a mating seat located between the inflow chamber and the outflow chamber, the valve body includes an upper connecting part and a lower connecting part that are detachably connected, the inflow chamber and the outflow chamber are both located in the lower connecting part, the mating seat and the lower connecting part are detachably connected, a left channel is provided in the mating seat on the left side of the valve stem, and a right channel is provided in the mating seat on the right side of the valve stem, a transfer channel that is interconnected with the left channel and the right channel is provided on the valve stem, the left channel is interconnected with the inflow chamber, and the right channel is interconnected with the outflow chamber, and the valve body is made of chromium-molybdenum-vanadium steel.

2. A stop valve according to claim 1, characterized in that: The transmission channel is arranged to be inclined from top to bottom and from left to right.

3. A stop valve according to claim 1 or 2, characterized in that: The left channel includes a left inlet at the bottom, and the right channel includes a right inlet at the right side. The left inlet is arranged to expand from top to bottom, and the right inlet is arranged to expand from left to right.

4. A stop valve according to claim 3, characterized in that: A mounting plug made of flexible material is provided in the mating seat and fits in contact with the bottom of the valve stem. Springs are compressed on both sides of the mounting plug. One end of each spring is fixedly connected to the mating seat, and the other end is fixedly connected to the mounting plug.

5. A stop valve according to claim 3, characterized in that: It also includes a sealing seat located above the mating seat, the sealing seat includes a head and an inserting portion located below the head, the bottom surface of the head is against the top of the mating seat, the inserting portion is inserted into the mating seat and circumferentially against the inner wall of the mating seat.

6. A stop valve according to claim 5, characterized in that: The upper connecting part is provided with a positioning plug made of a deformable material protruding downward, the lower connecting part is provided with a positioning slot corresponding to the positioning plug, the positioning plug is recessed inwardly and provided with a matching slot, and the lower connecting part is provided with a matching plug in the positioning slot.

7. A stop valve according to claim 6, characterized in that: The lower connecting portion is provided with connecting plugs on both sides of the left and right sides of the positioning slot, and the upper connecting portion is provided with connecting slots corresponding to the connecting plugs.

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