Stop valve with filter screen at liquid inlet end

Abstract

The utility model relates to the technical field of stop valves, in particular to a stop valve with a filter screen at a liquid inlet end, which comprises a valve body, a liquid inlet pipe and a liquid outlet pipe which are communicated with an inner cavity of the valve body are respectively fixed on the surfaces of the left side and the right side of the valve body, a mounting disc is mounted on the inner wall of the liquid inlet pipe close to the left end, and the filter screen is embedded on the surface of the left side of the mounting disc. And the scrubbing mechanism is arranged in the liquid inlet pipe and used for scrubbing the left side surface of the filter screen and comprises a rotating rod rotationally connected with the top surface of the liquid inlet pipe, and the rotating rod penetrates through the top surface of the liquid inlet pipe and extends to the position, close to the top end, in the liquid inlet pipe. Liquid entering the liquid inlet pipe can be filtered by arranging the mounting disc and the filter screen, blockage caused by the fact that impurities in the liquid enter the valve body can be prevented, the impurities accumulated on the surface of the left side of the filter screen can be brushed by arranging the brushing mechanism, blockage of the filter screen is prevented, and the service life of the valve is prolonged. And therefore, the liquid can smoothly flow.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a stop valve with a filter screen at a liquid inlet end. Background Art

[0002] The stop valve is a tool that relies on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of medium. It is a forced sealing valve and is mainly installed on high-temperature and high-pressure steam and water pipelines with a diameter of ≤100mm in the power plant pipeline system.

[0003] The patent with announcement number CN220185972U discloses a labor-saving and durable stop valve, including a valve body, the outer wall of the valve body is provided with a protective assembly, the inner wall of the valve body is movably connected with a valve stem, the bottom of the valve body is provided with a base assembly, and the inlet and outlet ends of the valve body are provided with connecting pipes; the protective assembly includes a support plate arranged on the outer wall of the valve body, the outer wall of the support plate is provided with a hydraulic rod, and one end of the hydraulic rod is provided with a protective shell.

[0004] Although the stop valve can achieve better protection effect through the setting of the protection component and the setting of the protection shell during use, the setting of the hydraulic rod can realize the movement and adjustment of the use position of the protection shell by starting and controlling the use of the hydraulic rod, thereby facilitating the operation of the valve stem. The number of protective shells is two, and the outer wall of the protective shell is provided with an observation window, which can facilitate the observation of the operating state of the valve stem, improves the use effect of the device, and provides convenience for the user. However, the stop valve does not have a filtering structure at its liquid inlet end, and cannot filter the liquid passing into the stop valve. When the liquid passing into the stop valve is mixed with foreign matter, it will cause the stop valve to be blocked. Utility Model Content

[0005] The utility model aims to provide a stop valve with a filter at the liquid inlet end, so as to solve the problem that the stop valve proposed in the above background technology has no filtering structure at its liquid inlet end and cannot filter the liquid passed into the stop valve, and when the liquid passed into the stop valve is mixed with foreign matter, the stop valve will be blocked.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A stop valve with a filter screen at the liquid inlet end comprises a valve body, a liquid inlet pipe and a liquid outlet pipe connected to the inner cavity of the valve body are respectively fixed on the left and right side surfaces of the valve body, a mounting plate is installed near the left end of the inner wall of the liquid inlet pipe, and a filter screen is embedded on the left side surface of the mounting plate, and further comprises:

[0008] The brushing mechanism is arranged inside the liquid inlet pipe and is used for brushing the left side surface of the filter screen. The brushing mechanism includes a rotating rod rotatably connected to the top surface of the liquid inlet pipe, the rotating rod penetrates the top surface of the liquid inlet pipe and extends to the inside of the liquid inlet pipe near the top. The brushing mechanism also includes a screw rod coaxially fixed to the bottom end of the rotating rod and rotatably connected to the inner bottom surface of the liquid inlet pipe, two guide plates fixed on the inner wall of the liquid inlet pipe and located on the left side of the filter screen, a movable plate slidably connected to the two guide plates and threadedly connected to the screw rod, a plurality of brush strips fixed to the right side surface of the movable plate and used for brushing the left side surface of the filter screen, two pulleys located above the liquid inlet pipe and connected by belt drive, and a mounting plate mounted on the top surface of the liquid inlet pipe, and a motor for driving the two pulleys to rotate is mounted on the top surface of the mounting plate.

[0009] As a preferred embodiment, the scrubbing mechanism further comprises a rotating shaft coaxially connected to the motor output shaft, wherein one of the pulleys is coaxially fixed to the outer wall of the rotating rod, and the other pulley is coaxially fixed to the outer wall of the rotating shaft.

[0010] As a preferred embodiment, a guide groove is provided on the right side surface of the guide plate, two connecting blocks are fixed on the left side surface of the movable plate, and a guide block is fixed on the left side surface of the connecting block which is slidably connected to the guide groove on the right side surface of the guide plate on the same side.

[0011] As a preferred embodiment, the size of the filter screen is matched with the inner cavity size of the liquid inlet pipe, the brush strip corresponds to the position of the filter screen and is matched in size, and the right side surface of the brush strip is tightly fitted with the left side surface of the filter screen.

[0012] As a preferred embodiment, a flange is fixedly sleeved on the circumferential outer wall of the liquid inlet pipe near the left end, and a flange is also fixedly sleeved on the circumferential outer wall of the liquid outlet pipe near the right end.

[0013] As a preferred implementation, the parts where the liquid inlet pipe and the liquid outlet pipe contact the valve body are provided with sealing rings, and the part where the rotating rod contacts the liquid inlet pipe is also provided with a sealing ring.

[0014] As a preferred embodiment, the scrubbing mechanism further includes a protection box fixed on the top surface of the mounting plate, the motor is located inside the protection box, and the rotating shaft passes through the top surface of the protection box.

[0015] As a preferred embodiment, the transverse cross-sectional shape of the guide groove on the right side surface of the guide plate is I-shaped, and the shape of the guide block is I-shaped to match the shape of the guide groove on the right side surface of the guide plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model can filter the liquid entering the liquid inlet pipe by setting the installation plate and the filter screen, which can prevent the debris in the liquid from entering the valve body and causing blockage. The debris accumulated on the left surface of the filter screen can be scrubbed by setting the brushing mechanism to prevent the filter screen from being blocked, thereby ensuring that the liquid can flow smoothly;

[0018] 2. In the utility model, a guide groove is provided on the right side surface of the guide plate, and two connecting blocks and two guide blocks are provided so as to guide the movement of the movable plate, and further guide the movement of several brush strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 3 It is a schematic diagram of the cross-section front view structure of the liquid inlet pipe in the utility model;

[0022] Figure 4 It is a schematic diagram of the cross-section front view structure of the liquid inlet pipe in the utility model;

[0023] Figure 5 This is a schematic diagram of the split structure of the installation plate in the utility model;

[0024] Figure 6 It is a structural schematic diagram of the brushing mechanism in the utility model;

[0025] Figure 7 It is a schematic diagram of the partial disassembly structure of the brushing mechanism in the utility model;

[0026] Figure 8 It is a schematic diagram of the partial disassembly structure of the scrubbing mechanism in the utility model.

[0027] The meaning of each number in the figure is:

[0028] 1. Valve body; 2. Liquid inlet pipe; 3. Liquid outlet pipe; 4. Flange; 5. Mounting plate; 6. Filter screen; 7. Brushing mechanism; 71. Rotating rod; 72. Screw rod; 73. Guide plate; 74. Moving plate; 75. Brush strip; 76. Mounting plate; 77. Belt; 78. Pulley; 79. Protection box; 710. Motor; 711. Rotating shaft; 712. Connecting block; 713. Guide block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 8 The utility model provides a technical solution: a stop valve with a filter screen at the liquid inlet end, comprising a valve body 1, a liquid inlet pipe 2 and a liquid outlet pipe 3 connected to the inner cavity of the valve body 1 are respectively fixed on the left and right side surfaces of the valve body 1, a mounting plate 5 is installed near the left end of the inner wall of the liquid inlet pipe 2, and a filter screen 6 is embedded on the left surface of the mounting plate 5, and also includes:

[0031] The brushing mechanism 7 is arranged inside the liquid inlet pipe 2 and is used to brush the left side surface of the filter screen 6. The brushing mechanism 7 includes a rotating rod 71 rotatably connected to the top surface of the liquid inlet pipe 2, the rotating rod 71 penetrates the top surface of the liquid inlet pipe 2 and extends to the inside of the liquid inlet pipe 2 near the top, and the brushing mechanism 7 also includes a screw 72 coaxially fixed to the bottom end of the rotating rod 71 and rotatably connected to the bottom surface of the liquid inlet pipe 2, two guide plates 73 fixed on the inner wall of the liquid inlet pipe 2 and located on the left side of the filter screen 6, a moving plate 74 slidably connected to the two guide plates 73 and threadedly connected to the screw 72, and a moving plate 74 fixed on the right side surface of the moving plate 74 and used to brush the left side surface of the filter screen 6. A plurality of brush strips 75 for scrubbing, two pulleys 78 located above the liquid inlet pipe 2 and connected by a belt 77, a mounting plate 76 mounted on the top surface of the liquid inlet pipe 2, and a motor 710 for driving the two pulleys 78 to rotate is mounted on the top surface of the mounting plate 76. By arranging the mounting plate 5 and the filter screen 6, the liquid entering the liquid inlet pipe 2 can be filtered, and the debris in the liquid can be prevented from entering the valve body 1 and causing blockage. By arranging the scrubbing mechanism 7, the debris accumulated on the left surface of the filter screen 6 can be scrubbed to prevent the filter screen 6 from being blocked, thereby ensuring that the liquid can flow smoothly.

[0032] In this embodiment, the brushing mechanism 7 also includes a rotating shaft 711 coaxially connected to the output shaft of the motor 710, wherein one pulley 78 is coaxially fixed on the outer wall of the rotating rod 71, and the other pulley 78 is coaxially fixed on the outer wall of the rotating shaft 711, which can smoothly drive the two pulleys 78 to rotate, and then drive the rotating rod 71 and the screw 72 to rotate.

[0033] In addition, a guide groove is provided on the right side surface of the guide plate 73, and two connecting blocks 712 are fixed on the left side surface of the movable plate 74. The left side surface of the connecting block 712 is fixed with a guide block 713 which is slidably connected to the guide groove on the right side surface of the guide plate 73 on the same side, which can guide the movement of the movable plate 74 and further guide the movement of several brush strips 75.

[0034] Furthermore, the size of the filter 6 is adapted to the inner cavity size of the liquid inlet pipe 2, the brush strip 75 corresponds to the position of the filter 6 and is adapted to the size, and the right side surface of the brush strip 75 fits tightly with the left side surface of the filter 6, so that the left side surface of the filter 6 can be brushed smoothly.

[0035] Specifically, a flange 4 is fixedly sleeved on the circumferential outer wall of the liquid inlet pipe 2 near the left end, and a flange 4 is also fixedly sleeved on the circumferential outer wall of the liquid outlet pipe 3 near the right end, so that external pipelines can be installed.

[0036] It is worth noting that sealing rings are provided at the contact parts of the liquid inlet pipe 2, the liquid outlet pipe 3 and the valve body 1, and a sealing ring is also provided at the contact part of the rotating rod 71 and the liquid inlet pipe 2, which can make the sealing of the entire stop valve better and prevent liquid leakage during the transportation process.

[0037] It is worth noting that the scrubbing mechanism 7 also includes a protection box 79 fixed on the top surface of the mounting plate 76 , the motor 710 is located inside the protection box 79 , and the rotating shaft 711 passes through the top surface of the protection box 79 , which can protect the motor 710 , thereby extending the service life of the motor 710 .

[0038] It is worth emphasizing that the transverse cross-sectional shape of the guide groove on the right side surface of the guide plate 73 is I-shaped, and the shape of the guide block 713 is I-shaped that matches the shape of the guide groove on the right side surface of the guide plate 73, which can make the connection between the guide block 713 and the guide groove on the right side surface of the movable plate 74 tighter, and indirectly make the several brush strips 75 more stable during movement.

[0039] Among them, the valve body 1 and the motor 710 involved in this embodiment are both existing technologies, and their structures and working principles are well known to those skilled in the art, and will not be elaborated here.

[0040] In the specific use of this embodiment, when it is necessary to brush the left side surface of the filter screen 6, the motor 710 is first started through the external PLC, and the output shaft of the motor 710 rotates to drive the rotating shaft 711 coaxially connected thereto to rotate, and the rotating shaft 711 rotates to drive the same side pulley 78 coaxially fixed thereto to rotate, and the rotation of the pulley 78 drives another pulley 78 connected thereto through a belt 77 to rotate, and the rotation of the pulley 78 drives the rotating rod 71 coaxially fixed thereto to rotate, and the rotation of the rotating rod 71 drives the screw 72 coaxially fixed thereto to rotate, and the rotation of the screw 72 drives the movable plate 74 threadedly connected thereto to move, and the movable plate 74 moves between the two connecting blocks 712 and the two guide blocks 713. The movable plate 74 moves under the guidance of the guide groove on the right side surface of the two guide plates 73. The movement of the movable plate 74 drives the several brush strips 75 fixed thereto to move. When the several brush strips 75 move to the inside of the liquid inlet pipe 2 near the bottom end, the output shaft of the motor 710 is reversed by controlling the external PLC, thereby driving the several brush strips 75 to move upward. When the dry brush strips 75 move to the inside of the liquid inlet pipe 2 near the top end, the output shaft of the motor 710 is controlled by the external PLC to rotate forward. The above operation is repeated, thereby making the several brush strips 75 reciprocate in the vertical direction inside the liquid inlet pipe 2. During the movement, the several brush strips 75 can brush the left side surface of the filter screen 6.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A stop valve with a filter screen at the liquid inlet end, comprising a valve body (1), characterized in that: The left and right side surfaces of the valve body (1) are respectively fixed with a liquid inlet pipe (2) and a liquid outlet pipe (3) connected to the inner cavity thereof, a mounting plate (5) is mounted on the inner wall of the liquid inlet pipe (2) near the left end, a filter screen (6) is embedded on the left side surface of the mounting plate (5), and further comprises: A scrubbing mechanism (7) is arranged inside the liquid inlet pipe (2) and is used to scrub the left side surface of the filter screen (6). The scrubbing mechanism (7) comprises a rotating rod (71) rotatably connected to the top surface of the liquid inlet pipe (2). The rotating rod (71) penetrates the top surface of the liquid inlet pipe (2) and extends to the inside of the liquid inlet pipe (2) near the top. The scrubbing mechanism (7) also comprises a screw rod (72) coaxially fixed to the bottom end of the rotating rod (71) and rotatably connected to the inner bottom surface of the liquid inlet pipe (2), and two guide rods (72) fixed on the inner wall of the liquid inlet pipe (2) and located on the left side of the filter screen (6). A guide plate (73), a movable plate (74) slidably connected to the two guide plates (73) and threadedly connected to the screw rod (72), a plurality of brush strips (75) fixed to the right side surface of the movable plate (74) and used for brushing the left side surface of the filter screen (6), two pulleys (78) located above the liquid inlet pipe (2) and connected by a belt (77), and a mounting plate (76) mounted on the top surface of the liquid inlet pipe (2), wherein a motor (710) for driving the two pulleys (78) to rotate is mounted on the top surface of the mounting plate (76).

2. The stop valve with a filter screen at the liquid inlet end according to claim 1, characterized in that: The scrubbing mechanism (7) further comprises a rotating shaft (711) coaxially connected to the output shaft of the motor (710), wherein one of the pulleys (78) is coaxially fixed on the outer wall of the rotating rod (71), and the other pulley (78) is coaxially fixed on the outer wall of the rotating shaft (711).

3. The stop valve with a filter screen at the liquid inlet end according to claim 1, characterized in that: A guide groove is provided on the right side surface of the guide plate (73), two connection blocks (712) are fixed on the left side surface of the movable plate (74), and a guide block (713) is fixed on the left side surface of the connection block (712) which is slidably connected to the guide groove on the right side surface of the guide plate (73) on the same side.

4. The stop valve with a filter screen at the liquid inlet end according to claim 1, characterized in that: The size of the filter screen (6) is matched to the inner cavity size of the liquid inlet pipe (2); the brush strip (75) corresponds to the position of the filter screen (6) and is matched in size; and the right side surface of the brush strip (75) is tightly fitted to the left side surface of the filter screen (6).

5. The stop valve with a filter screen at the liquid inlet end according to claim 1, characterized in that: A flange (4) is fixedly sleeved on the circumferential outer wall of the liquid inlet pipe (2) near the left end, and a flange (4) is also fixedly sleeved on the circumferential outer wall of the liquid outlet pipe (3) near the right end.

6. The stop valve with a filter screen at the liquid inlet end according to claim 1, characterized in that: The parts where the liquid inlet pipe (2) and the liquid outlet pipe (3) contact the valve body (1) are both provided with sealing rings, and the part where the rotating rod (71) contacts the liquid inlet pipe (2) is also provided with a sealing ring.

7. The stop valve with a filter screen at the liquid inlet end according to claim 2, characterized in that: The scrubbing mechanism (7) further comprises a protection box (79) fixed on the top surface of the mounting plate (76); the motor (710) is located inside the protection box (79), and the rotating shaft (711) passes through the top surface of the protection box (79).

8. The stop valve with a filter screen at the liquid inlet end according to claim 3, characterized in that: The transverse cross-sectional shape of the guide groove on the right side surface of the guide plate (73) is in the shape of an I-shape, and the shape of the guide block (713) is in the shape of an I-shape that matches the shape of the guide groove on the right side surface of the guide plate (73).

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