High-temperature and high-pressure hard sealing ball valve

Abstract

The utility model relates to the technical field of ball valves, in particular to a high-temperature and high-pressure hard sealing ball valve which comprises a ball valve shell, a ball body is arranged in the ball valve shell, sealing rings are sleeved on the front side and the rear side of the ball body, a valve rod is rotatably connected to the top of the ball valve shell, a handle is sleeved on the outer side of the valve rod, and a rear sealing piece is connected to the rear end of the ball valve shell in an attached mode. First fixing lugs are fixedly connected to the four corners of the outer side of the rear sealing piece, a front sealing piece is connected to the front end of the ball valve shell in an attached mode, second fixing lugs are fixedly connected to the four corners of the outer side of the front sealing piece, a feeding pipe is fixedly connected to the front end of the front sealing piece, and a connecting plate is fixedly connected to the bottom of the feeding pipe. According to the high-temperature and high-pressure hard sealing ball valve, through the arrangement of the filtering mechanism, when the high-temperature and high-pressure hard sealing ball valve is used, impurities in media can be filtered out, the impurities doped in the media are prevented from entering the ball valve, the situation that the interior of the ball valve is seriously abraded is avoided, and the service life of the ball valve is prolonged.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of ball valves, in particular to a high-temperature and high-pressure hard-sealed ball valve. Background Art

[0002] The ball valve is a valve whose opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. The hard-sealed V-type ball valve has a strong shear force between its V-type ball core and the metal valve seat with hard alloy surfacing, which is particularly suitable for media containing fibers, tiny solid particles, etc. The multi-way ball valve can not only flexibly control the confluence, diversion, and flow direction switching of the medium on the pipeline, but also close any channel to connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. Ball valves are divided into: pneumatic ball valves, electric ball valves, and manual ball valves according to the driving method.

[0003] After searching, it is found that the utility model patent with announcement number CN211039763U discloses a high-temperature and high-pressure hard-sealed ball valve, including a first valve body, a first flange fixedly mounted on one side surface of the first valve body, a first connecting plate fixedly mounted on the other side surface of the first valve body, a second valve body fixedly mounted on one side of the first valve body, a second flange fixedly mounted on one side surface of the second valve body, and a second connecting plate fixedly mounted on the other side surface of the second valve body; a fixing plate fixedly mounted on the upper end of the first valve body, a packing pressure plate fixedly mounted on the upper surface of the fixing plate; in this patent, the first valve body, the second valve body and the ball are made of heat-resistant steel with the function of resisting high temperature and high pressure, and two sealing rings are arranged inside the first valve body to improve the sealing performance of the ball valve, and the first valve body and the second valve body are fixed by the first connecting plate and the second connecting plate, so as to facilitate the user to clean the inside of the valve.

[0004] In the above patented technical solution, two sealing rings are arranged inside the first valve body, so as to improve the sealing performance of the ball valve. The first valve body and the second valve body are fixed by the first connecting plate and the second connecting plate, so as to facilitate the user to clean the inside of the valve. However, the above patented technical solution still has the following shortcomings when used:

[0005] 1. When the above patented technical solution is used, the inlet of the ball valve does not have a filtering measure for impurities in the medium, which makes it easy for impurities in the medium to enter the interior of the ball valve, causing serious wear inside the ball valve and reducing the service life of the ball valve;

[0006] 2. When the above patented technical solution is used, two sealing rings are arranged inside the first valve body to improve the sealing performance of the ball valve. The first valve body and the second valve body are fixed by the first connecting plate and the second connecting plate, which is convenient for users to clean the inside of the valve. Although the above patented technical solution can clean the inside of the valve body, it is not convenient to replace the sealing rings on both sides of the valve core. The ball core is easy to cause wear to the sealing ring during rotation. Long-term use will easily cause leakage, and the stability of the ball valve will decrease during use.

[0007] Therefore, we provide high temperature and high pressure hard seal ball valve to solve the defects in the above technical solutions. Utility Model Content

[0008] The utility model mainly provides a high-temperature and high-pressure hard-sealed ball valve to solve the technical problems raised in the above-mentioned background technology.

[0009] The technical solution adopted by the utility model to solve the above technical problems is:

[0010] A high-temperature and high-pressure hard-sealed ball valve comprises a ball valve housing, a ball is arranged inside the ball valve housing, sealing rings are sleeved on the front and rear sides of the ball, a valve stem is rotatably connected to the top of the ball valve housing, a handle is sleeved on the outside of the valve stem, a rear seal is fittedly connected to the rear end of the ball valve housing, a fixing ear 1 is fixedly connected to the four corners on the outside of the rear seal, a discharge pipe is fixedly connected to the rear end of the rear seal, a rear connecting flange is fixedly connected to the rear end of the discharge pipe, a front seal is fittedly connected to the front end of the ball valve housing, a fixing ear 2 is fixedly connected to the four corners on the outside of the front seal, a feed pipe is fixedly connected to the front end of the front seal, a front connecting flange is fixedly connected to the front end of the feed pipe, a connecting plate is fixedly connected to the bottom of the feed pipe, connecting screws are fixedly connected to the four corners at the bottom of the connecting plate, and a filtering mechanism is provided at the bottom of the connecting plate.

[0011] Furthermore, a baffle plate is fixedly connected at the center of the feed pipe, a first channel is opened inside the feed pipe and at the front end of the baffle plate, a first connecting port is opened at the bottom end of the first channel, a second channel is opened inside the feed pipe and at the rear end of the baffle plate, and a second connecting port is opened at the bottom end of the second channel.

[0012] Furthermore, the filtering mechanism includes a filter box that is fitted and connected to the bottom of the connecting plate, connecting ears are fixedly connected at the top corners on both sides of the left and right sides of the filter box, a through hole is provided on the top of the connecting ear, a filter groove is provided on the top of the filter box, support rods are fixedly connected to the inner walls on both sides of the left and right sides of the filter groove, limiting rods are fixedly connected to the rear ends of the inner walls on both sides of the left and right sides of the filter groove and located above the support rods, a filter screen is provided between the limiting rod and the support rod, and a hand dial block is fixedly connected to the center of the front end of the top of the filter screen.

[0013] Furthermore, the connecting ear is slidably connected to the connecting screw through a through hole opened at the top, a nut is threadedly connected to the outer side of the connecting screw, the top of the nut is in conflict with the bottom of the connecting ear, and a sealing gasket is provided at the joint between the connecting plate and the filter box.

[0014] Furthermore, the filter screen is slidably connected to the limit rod and the support rod, the front end of the top of the filter tank is connected to the first channel through the first connecting port, and the rear end of the top of the filter tank is connected to the second channel through the second connecting port.

[0015] Furthermore, a fixing screw is slidably inserted between the fixing ear 1 and the fixing ear 2, and a locking nut is threadedly connected to the outer side of the fixing screw, and the rear end of the locking nut is in conflict with the front end of the fixing ear 2.

[0016] Furthermore, the outer side of the valve stem is threadedly connected with two fastening nuts, and opposite sides of the two fastening nuts are respectively in contact with the upper and lower sides of the handle.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model provides a filtering mechanism, which drives the valve stem to rotate by turning the handle, so that the valve stem drives the ball to rotate, thereby making the interior of the ball valve housing unblocked, and then the conveyed medium enters the first channel opened in the feed pipe, and then enters the filter tank through the first connecting port, and then enters the second channel through the second connecting port after being filtered by the filter under the action of pressure, and finally flows into the interior of the ball valve housing, while the filtered impurities are retained in the filter tank, thereby realizing medium filtering and conveying. At the same time, after the filter has been filtered for a long time, the staff can close the conveying system, then unscrew the nut on the connecting screw, remove the filter box, and then clean up the impurities in the filter tank, and then use the hand-operated block to move the filter to the front end of the filter box, and then remove the filter for cleaning, so that when the high-temperature and high-pressure hard-sealed ball valve is used, it can filter the impurities in the medium, prevent the impurities mixed in the medium from entering the interior of the ball valve, avoid serious wear inside the ball valve, and improve the service life of the ball valve.

[0019] 2. The utility model is used in combination with a ball valve housing, a front seal, a rear seal, a fixing screw and a locking nut. When it is found that the two sealing rings are worn and leaking, the staff can unscrew the locking nut and then pull out the fixing screw from the fixing ear one and the fixing ear two, and then the front seal and the rear seal can be removed from the ball valve housing. Then the damaged sealing ring can be taken out from the inside of the ball valve housing and replaced. When the high-temperature and high-pressure hard-sealed ball valve is used, the sealing ring arranged inside the ball valve can be easily replaced to avoid leakage and improve the stability of the ball valve when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall internal right side structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the filter mechanism structure of the utility model;

[0023] Figure 4 for Figure 1 Magnified view of area A in .

[0024] In the figure: 1. ball valve housing; 101. front seal; 102. rear seal; 103. fixing ear 1; 104. fixing ear 2; 105. fixing screw; 106. locking nut; 107. valve stem; 108. handle; 109. fastening nut; 110. ball; 111. sealing ring; 112. discharge pipe; 113. rear connecting flange; 2. feed pipe; 201. front connecting flange; 202. connecting plate; 203. connecting screw; 204. blocking plate; 205. first channel; 206. first connecting port; 207. second channel; 208. second connecting port; 3. filtering mechanism; 301. filter box; 302. connecting ear; 303. through hole; 304. sealing pad; 305. filter tank; 306. filter screen; 307. hand dial block; 308. support rod; 309. limit rod. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0026] For examples, please refer to the attached Figure 1-4As shown, a high-temperature and high-pressure hard-sealed ball valve comprises a ball valve housing 1, a ball 110 is arranged inside the ball valve housing 1, sealing rings 111 are sleeved on both the front and rear sides of the ball 110, a valve stem 107 is rotatably connected to the top of the ball valve housing 1, a handle 108 is sleeved on the outside of the valve stem 107, a rear sealing member 102 is fittedly connected to the rear end of the ball valve housing 1, and fixing ears 103 are fixedly connected to the four corners of the outer side of the rear sealing member 102, a discharge pipe 112 is fixedly connected to the rear end of the rear sealing member 102, and the discharge pipe 111 is fixedly connected to the discharge pipe 112. 2 The rear end is fixedly connected with a rear connecting flange 113, the front end of the ball valve housing 1 is fittedly connected with a front seal 101, the four outer corners of the front seal 101 are fixedly connected with fixing ears 104, the front end of the front seal 101 is fixedly connected with a feed pipe 2, the front end of the feed pipe 2 is fixedly connected with a front connecting flange 201, the bottom of the feed pipe 2 is fixedly connected with a connecting plate 202, the four corners of the bottom of the connecting plate 202 are fixedly connected with connecting screws 203, and the bottom of the connecting plate 202 is provided with a filtering mechanism 3.

[0027] Among them, a baffle plate 204 is fixedly connected at the center of the feed pipe 2, a first channel 205 is opened inside the feed pipe 2 and at the front end of the baffle plate 204, a first connecting port 206 is opened at the bottom of the first channel 205, a second channel 207 is opened inside the feed pipe 2 and at the rear end of the baffle plate 204, and a second connecting port 208 is opened at the bottom of the second channel 207. The valve stem 107 is driven to rotate by rotating the handle 108, so that the valve stem 107 drives the ball 110 to rotate, so that the interior of the ball valve housing 1 is unblocked, and then the transported medium enters the first channel 205 opened in the feed pipe 2, and then enters the filter tank 305 through the first connecting port 206, and then enters the second channel 207 through the second connecting port 208 after being filtered by the filter net 306 under pressure, and finally flows into the interior of the ball valve housing 1 to achieve medium filtration and transportation.

[0028] The filter mechanism 3 includes a filter box 301 that is attached to the bottom of the connecting plate 202. The top corners of the left and right sides of the filter box 301 are fixedly connected with connecting ears 302. The top of the connecting ears 302 is provided with a through hole 303. The top of the filter box 301 is provided with a filter slot 305. The inner walls of the left and right sides of the filter slot 305 are fixedly connected with support rods 308. The rear ends of the inner walls of the left and right sides of the filter slot 305 and located above the support rods 308 are fixedly connected with limit rods 309. A filter screen 306 is provided between the limit rod 309 and the support rod 308, a hand-operated block 307 is fixedly connected to the center of the front end of the top of the filter screen 306, the connecting ear 302 is slidably connected to the connecting screw 203 through the through hole 303 opened on the top, a nut is threadedly connected to the outer side of the connecting screw 203, the top of the nut is in conflict with the bottom of the connecting ear 302, and a sealing gasket 304 is provided at the joint between the connecting plate 202 and the filter box 301, the filter screen 306 is fixed to the limit rod 309 and the support rod 30 8 are slidably connected, the front end of the top of the filter tank 305 is connected to the first channel 205 through the first connecting port 206, and the rear end of the top of the filter tank 305 is connected to the second channel 207 through the second connecting port 208. Under the action of pressure, the impurities are filtered by the filter screen 306 and enter the second channel 207 through the second connecting port 208, and finally flow into the interior of the ball valve housing 1, while the filtered impurities are retained in the filter tank 305, so as to realize medium filtering and transportation. At the same time, after the filter screen 306 has been filtered for a long time, the staff can close the transportation system, then unscrew the nut on the connecting screw 203, remove the filter box 301, and then clean up the impurities in the filter tank 305, and then use the hand-operated block 307 to move the filter screen 306 to the front end of the filter box 301, so that the filter screen 306 can be removed for cleaning, so as to prevent the impurities mixed in the medium from entering the interior of the ball valve, avoid serious wear inside the ball valve, and improve the service life of the ball valve.

[0029] Among them, a fixing screw 105 is slidably inserted between the fixing ear 103 and the fixing ear 2 104, and a locking nut 106 is threadedly connected to the outer side of the fixing screw 105, and the rear end of the locking nut 106 conflicts with the front end of the fixing ear 2 104. When it is found that the two sealing rings 111 are worn and leaking, the staff can unscrew the locking nut 106, and then pull the fixing screw 106 out of the fixing ear 103 and the fixing ear 2 104, and then the front seal 101 and the rear seal 102 can be removed from the ball valve housing 1, and then the damaged sealing ring 111 can be taken out from the inside of the ball valve housing 1 and replaced, so as to avoid leakage and improve the stability of the ball valve during use.

[0030] Among them, two fastening nuts 109 are threadedly connected to the outer side of the valve stem 107, and the opposite sides of the two fastening nuts 109 are respectively in conflict with the upper and lower sides of the handle 108. By rotating the handle 108, the valve stem 107 is rotated, and the valve stem 107 drives the ball 110 to rotate, so that the interior of the ball valve housing 1 is unobstructed.

[0031] The specific operation mode of the utility model is as follows:

[0032] First, the valve stem 107 is driven to rotate by turning the handle 108, so that the valve stem 107 drives the ball 110 to rotate, so that the interior of the ball valve housing 1 is unblocked, and then the transported medium enters the first channel 205 opened in the feed pipe 2, and then enters the filter tank 305 through the first connecting port 206, and then enters the second channel 207 through the second connecting port 208 after being filtered by the filter screen 306 under the action of pressure, and finally flows into the interior of the ball valve housing 1, while the filtered impurities are retained in the filter tank 305, realizing medium filtration and transportation. At the same time, after the filter screen 306 has been filtered for a long time, the staff can close the conveying system, then unscrew the nut on the connecting screw 203, remove the filter box 301, and then The impurities in the filter tank 305 are cleaned out, and then the filter screen 306 is moved to the front end of the filter box 301 by the hand-operated block 307, and the filter screen 306 can be removed for cleaning to prevent impurities mixed in the medium from entering the interior of the ball valve, avoid serious wear of the interior of the ball valve, and improve the service life of the ball valve. When it is found that the two sealing rings 111 are worn and leaking, the staff can unscrew the locking nut 106, and then withdraw the fixing screw 106 from the fixing ear 103 and the fixing ear 2 104, and then the front seal 101 and the rear seal 102 can be removed from the ball valve housing 1, and then the damaged sealing ring 111 can be taken out from the inside of the ball valve housing 1 and replaced, so as to avoid leakage and improve the stability of the ball valve during use.

[0033] The above description of the utility model in combination with the accompanying drawings is an exemplary description. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as the non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A high-temperature and high-pressure hard-sealed ball valve, comprising a ball valve housing (1), characterized in that: A ball (110) is provided inside the ball valve housing (1), and sealing rings (111) are sleeved on both the front and rear sides of the ball (110). A valve stem (107) is rotatably connected to the top of the ball valve housing (1), and a handle (108) is sleeved on the outside of the valve stem (107). A rear sealing member (102) is fittedly connected to the rear end of the ball valve housing (1), and fixing ears (103) are fixedly connected to the four corners of the outer side of the rear sealing member (102). A discharge pipe (112) is fixedly connected to the rear end of the discharge pipe (112), and a rear connection The front end of the ball valve housing (1) is fittedly connected with a front seal (101), and the four outer corners of the front seal (101) are fixedly connected with fixing ears (104), the front end of the front seal (101) is fixedly connected with a feed pipe (2), the front end of the feed pipe (2) is fixedly connected with a front connecting flange (201), the bottom of the feed pipe (2) is fixedly connected with a connecting plate (202), the four corners of the bottom of the connecting plate (202) are fixedly connected with connecting screws (203), and a filtering mechanism (3) is provided at the bottom of the connecting plate (202).

2. The high temperature and high pressure hard seal ball valve according to claim 1, characterized in that: A baffle plate (204) is fixedly connected at the center of the feed pipe (2); a first channel (205) is provided inside the feed pipe (2) and at the front end of the baffle plate (204); a first connecting port (206) is provided at the bottom end of the first channel (205); a second channel (207) is provided inside the feed pipe (2) and at the rear end of the baffle plate (204); a second connecting port (208) is provided at the bottom end of the second channel (207).

3. The high temperature and high pressure hard seal ball valve according to claim 2, characterized in that: The filtering mechanism (3) comprises a filtering box (301) which is closely connected to the bottom of the connecting plate (202); connecting ears (302) are fixedly connected at the top corners on both sides of the filtering box (301); a through hole (303) is provided at the top of the connecting ear (302); a filtering groove (305) is provided at the top of the filtering box (301); supporting rods (308) are fixedly connected to the inner walls on both sides of the filtering groove (305); limiting rods (309) are fixedly connected to the rear ends of the inner walls on both sides of the filtering groove (305) and above the supporting rods (308); a filter screen (306) is provided between the limiting rod (309) and the supporting rod (308); and a hand-operated block (307) is fixedly connected to the center of the front end of the top of the filter screen (306).

4. The high temperature and high pressure hard seal ball valve according to claim 3, characterized in that: The connecting ear (302) is slidably connected to the connecting screw (203) via a through hole (303) opened at the top, a nut is threadedly connected to the outer side of the connecting screw (203), the top of the nut is in contact with the bottom of the connecting ear (302), and a sealing gasket (304) is provided at the joint between the connecting plate (202) and the filter box (301).

5. The high temperature and high pressure hard seal ball valve according to claim 3, characterized in that: The filter screen (306) is slidably connected to the limit rod (309) and the support rod (308); the front end of the top of the filter tank (305) is connected to the first channel (205) through the first connecting port (206); and the rear end of the top of the filter tank (305) is connected to the second channel (207) through the second connecting port (208).

6. The high temperature and high pressure hard seal ball valve according to claim 1, characterized in that: A fixing screw (105) is slidably inserted between the fixing ear 1 (103) and the fixing ear 2 (104), and a locking nut (106) is threadedly connected to the outer side of the fixing screw (105), and the rear end of the locking nut (106) is in conflict with the front end of the fixing ear 2 (104).

7. The high temperature and high pressure hard seal ball valve according to claim 1, characterized in that: The outer side of the valve stem (107) is threadedly connected with two fastening nuts (109), and opposite sides of the two fastening nuts (109) are respectively in contact with the upper and lower sides of the handle (108).

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