A lever cock valve

Abstract

The utility model relates to valve technical field especially is involved in a kind of lifting type plug valve, including valve body, plug, valve seat, valve stem, valve cover, operating mechanism and handle, plug and valve seat sealing cooperation are arranged in the inside of valve body for separating flow passage, valve cover is installed in the side of valve body, valve stem one end is connected with plug and other end is connected with operating mechanism and is penetrated through valve cover, operating mechanism is used to drive plug to lift, handle is connected with the middle part of valve stem, handle is used to drive plug to rotate, the inside of valve body is also equipped with scraper assembly, scraper assembly includes the scraper sleeve being set in the valve body, the end of scraper sleeve close to valve seat is equipped with the annular scraper being compatible with the outer circumferential wall of plug, when handle drives plug to rotate, annular scraper keeps abutment with plug, the utility model can realize cleaning to the sealing surface of plug by scraper assembly, effectively prevent plug jamming caused by medium accumulation, also guarantee good sealing property.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a lift-type plug valve. Background Technology

[0002] A plug valve is a rotary valve with a shut-off element or plunger. It is a type of valve that opens or closes by rotating 90 degrees to connect or separate the passage on the plug from the passage on the valve body. The plug can be cylindrical or conical. In a conical plug, the passage is trapezoidal.

[0003] Patent CN2630587Y discloses a lifting plug valve. This design has a handwheel installed at the end of the valve stem and a handle installed in the middle of the valve stem. The handwheel drives the valve stem and plug to rise and fall through the valve stem nut, while the handle is used to open and close the plug. This design effectively solves the problem of high operating torque in ordinary plug valves.

[0004] However, further investigation revealed the following problems with the solution: Under long-term operation, the medium will settle or adhere to the surface of the plug, meaning that the sealing surface of the plug will be affected by the medium, causing the plug to jam or not close properly. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a lifting plug valve. This invention can clean the sealing surface of the plug through the scraper assembly, effectively preventing the plug from getting stuck due to the accumulation of medium, and also ensuring good sealing performance.

[0006] The technical solution adopted by this utility model is as follows: A lifting plug valve includes a valve body, a plug, a valve seat, a valve stem, a valve cover, an operating mechanism, and a handle. The plug is sealed and fitted with the valve seat inside the valve body to separate the flow channel. The valve cover is installed on one side of the valve body. One end of the valve stem is connected to the plug, and the other end passes through the valve cover and is connected to the operating mechanism. The operating mechanism is used to drive the plug to rise and fall. The handle is connected to the middle of the valve stem and is used to drive the plug to rotate. A scraper assembly is also provided inside the valve body. The scraper assembly includes a scraper sleeve disposed inside the valve body. The end of the scraper sleeve near the valve seat is provided with an annular scraper adapted to the outer peripheral wall of the plug. When the handle drives the plug to rotate, the annular scraper keeps in contact with the plug.

[0007] The scraper sleeve is also provided with a grid-shaped scraper that is adapted to the outer peripheral wall of the valve. The grid-shaped scraper is located on the inner periphery of the annular scraper, and the grid-shaped scraper has several flow holes that communicate with the flow channel. When the handle drives the valve to rotate, the annular scraper and the grid-shaped scraper simultaneously abut against the valve.

[0008] The inner wall of one side of the scraper sleeve is provided with a guide slope.

[0009] The scraper assembly also includes a metal sleeve that is fitted over the outside of the scraper sleeve, and the outer periphery of the annular scraper extends between the metal sleeve and the valve.

[0010] It also includes a mounting sleeve that is threaded to the inner wall of the valve body, and the scraper assembly is clamped between the mounting sleeve and the stopcock.

[0011] One end of the mounting sleeve extends between the scraper sleeve and the inner wall of the valve body, and a mounting ring groove is provided on the side of the mounting sleeve facing the inner wall of the valve body. An elastic element is fitted inside the mounting ring groove, with one end of the elastic element abutting against the mounting sleeve and the other end abutting against the metal sleeve.

[0012] The mounting sleeve has several quick-release grooves on its outer periphery at the end away from the metal sleeve.

[0013] Both the annular scraper and the grid scraper are made of silicone.

[0014] The beneficial effects of this utility model are as follows: This utility model can clean the sealing surface of the plug valve through the scraper assembly. During the rotation and opening / closing of the plug valve, the scraper assembly remains in contact with the outer peripheral wall of the plug valve, which can continuously scrape off the media deposited or attached to the surface of the plug valve, effectively preventing the plug valve from getting stuck due to media accumulation. Cleaning can be performed as long as the plug valve rotates, which can maintain the cleanliness of the plug valve sealing surface for a long time, and also ensure good sealing performance and long-term working reliability. The scraper assembly adopts a simplified structure and is integrated into the valve body, requiring no additional operation or complex maintenance. It solves the problem of media sedimentation under long-term operation without increasing the operating burden of the valve, which is conducive to extending the service life of the plug valve. The overall design is optimized based on the lift-type plug valve, taking into account the advantage of low operating torque. At the same time, the scraper assembly improves the resistance to media interference, making it suitable for more demanding working environments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of a lifting plug valve according to the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; In the figure, 1-valve body, 2-throttle, 3-valve seat, 4-valve stem, 5-valve cover, 6-operating mechanism, 7-handle, 8-flow channel, 9-scraper sleeve, 10-annular scraper, 11-grid scraper, 12-flow hole, 13-guide slope, 14-metal sleeve, 15-mounting sleeve, 16-mounting ring groove, 17-elastic element, 18-quick release groove. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figures 1 to 2 As shown in the figure, an embodiment of the present invention is a lifting plug valve, including a valve body 1, a plug 2, a valve seat 3, a valve stem 4, a valve cover 5, an operating mechanism 6, and a handle 7. The plug 2 is sealed and fitted with the valve seat 3 inside the valve body 1 to separate the flow channel 8. The valve cover 5 is installed on one side of the valve body 1. One end of the valve stem 4 is connected to the plug 2, and the other end passes through the valve cover 5 and is connected to the operating mechanism 6. The operating mechanism 6 is used to drive the plug 2 to rise and fall. The handle 7 is connected to the middle of the valve stem 4 and is used to drive the plug 2 to rotate. The valve body 1 is also provided with a scraper assembly. The scraper assembly includes a scraper sleeve 9 disposed inside the valve body 1. The scraper sleeve 9 near the valve seat 3 is provided with an annular scraper 10 adapted to the outer peripheral wall of the plug 2. When the handle 7 drives the plug 2 to rotate, the annular scraper 10 keeps in contact with the plug 2.

[0021] The beneficial effects of this design are as follows: This utility model can clean the sealing surface of the plug valve through the scraper assembly. During the rotation and opening / closing of the plug valve, the scraper assembly remains in contact with the outer peripheral wall of the plug valve, continuously scraping away the media deposited or attached to the plug valve surface. This effectively prevents the plug valve from jamming due to media accumulation. Cleaning can be performed as long as the plug valve rotates, maintaining the cleanliness of the plug valve sealing surface for a long time, and ensuring good sealing performance and long-term operational reliability. The scraper assembly adopts a simplified structure and is integrated inside the valve body, requiring no additional operation or complex maintenance. It solves the problem of media sedimentation under long-term operation without increasing the operational burden of the valve, which helps to extend the service life of the plug valve. The overall design is optimized based on the lift-type plug valve, taking into account the advantage of low operating torque. At the same time, the scraper assembly improves the resistance to media interference, making it suitable for more demanding working environments.

[0022] Furthermore, the scraper sleeve 9 is also provided with a grid-shaped scraper 11 that is adapted to the outer peripheral wall of the valve 2. The grid-shaped scraper 11 is disposed on the inner periphery of the annular scraper 10, and the grid-shaped scraper 11 is provided with a plurality of flow holes 12 that communicate with the flow channel 8. When the handle 7 drives the valve 2 to rotate, the annular scraper 10 and the grid-shaped scraper 11 simultaneously abut against the valve 2.

[0023] The beneficial effects of this design are as follows: the addition of a grid-shaped scraper that works in conjunction with the annular scraper increases the scraping area, improves scraping efficiency, and results in better cleaning. The flow holes on the grid-shaped scraper allow the scraped media particles to be carried away by the fluid in a timely manner, effectively preventing blockage in the area near the scraper, ensuring smooth flow, balancing fluid permeability, and minimizing the impact on valve flow resistance.

[0024] As a further feature, a guide slope 13 is provided on one side of the inner wall of the scraper sleeve 9.

[0025] The beneficial effects of this design are as follows: the guide ramp is used to further guide the scraped medium to be carried away by the fluid and prevent it from depositing inside the scraper sleeve, thus preventing blockage of the flow hole. The guide ramp is set according to the installation position of the operating mechanism of the plug valve. For example, if the operating mechanism is installed vertically above the valve body, the guide ramp will be set on the inner wall of the scraper sleeve on the side away from the operating mechanism. When the operating mechanism is installed horizontally on the side of the valve body, the guide ramp will be set at the bottom of the scraper sleeve in the vertical direction. In this case, the guide ramp and the operating mechanism are not on the same axis.

[0026] In a further configuration, the scraper assembly also includes a metal sleeve 14, which is fitted over the outside of the scraper sleeve 9, and the outer periphery of the annular scraper 10 extends between the metal sleeve 14 and the stopcock 2.

[0027] The beneficial effects of this design are as follows: by installing a metal sleeve over the scraper sleeve, the overall structural strength and rigidity of the scraper assembly are significantly enhanced, enabling it to better withstand the impact of fluid and the friction of the valve. The outer circumference of the annular scraper extends between the metal sleeve and the valve, with the metal sleeve providing more stable support for the scraper, effectively preventing deformation or damage to the scraper during long-term operation, and greatly improving the durability and operational reliability of the scraper assembly.

[0028] Further, it also includes a mounting sleeve 15 that is threaded to the inner wall of the valve body 1, and the scraper assembly is clamped between the mounting sleeve 15 and the plug 2.

[0029] The advantages of this design are as follows: the scraper assembly is modularly fixed to the valve body via a threaded mounting sleeve, enabling quick and independent installation and disassembly of the scraper assembly, greatly facilitating subsequent maintenance, cleaning, or replacement. Simultaneously, this structure securely clamps the scraper assembly in its designated position, effectively preventing displacement under fluid impact or vibration, and ensuring the long-term stability and reliability of the fit between the scraper assembly and the valve stem.

[0030] Further, one end of the mounting sleeve 15 extends between the scraper sleeve 9 and the inner wall of the valve body 1, and the mounting sleeve 15 has a mounting annular groove 16 on the side facing the inner wall of the valve body 1. An elastic element 17 is fitted inside the mounting annular groove 16. One end of the elastic element 17 abuts against the mounting sleeve 15 and the other end abuts against the metal sleeve 14.

[0031] The beneficial effects of this design are as follows: By incorporating a buffer compensation structure consisting of a mounting ring groove and an elastic element, a stable axial preload is provided for the scraper assembly. This design automatically compensates for gaps caused by temperature changes or wear, ensuring that the scraper and the plug maintain appropriate contact pressure at all times. This avoids both increased operating torque due to excessive tightness and scraping failure caused by loosening. Simultaneously, the elastic element effectively absorbs vibration, improving the stability and reliability of the valve during operation. Furthermore, under the action of the elastic element, the scraper assembly can displace towards the plug to maintain contact with it. When the plug is lifted by the operating mechanism, the scraper assembly can also perform axial scraping of the plug, further increasing the scraping range and achieving all-around scraping of the plug's sealing surface. In this embodiment, the elastic element uses a spring, a technology already in use.

[0032] As a further feature, the outer periphery of the end of the mounting sleeve 15 away from the metal sleeve 14 is provided with several quick-release grooves 18.

[0033] The benefits of this design are as follows: the quick-release slot facilitates the insertion and screwing of tools into the sleeve, enabling the scraper assembly to be quickly disassembled and assembled, simplifying the maintenance process, and improving convenience and work efficiency.

[0034] Furthermore, both the annular scraper 10 and the grid-shaped scraper 11 are made of silicone.

[0035] The beneficial effects of this design are as follows: the annular and grid-shaped scrapers are made of silicone, which possesses excellent elasticity and flexibility. This allows for effective removal of impurities while also adaptively compensating for wear, preventing hard scratches on the valve sealing surface. Silicone's strong corrosion resistance extends the scraper's service life in harsh media, and its self-lubricating properties help reduce the rotational friction torque of the valve, making operation easier.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A lifting plug valve, comprising a valve body (1), a plug (2), a valve seat (3), a valve stem (4), a valve cover (5), an operating mechanism (6), and a handle (7), wherein the plug (2) is sealed to the valve seat (3) and disposed inside the valve body (1) to separate the flow channel (8); the valve cover (5) is installed on one side of the valve body (1); one end of the valve stem (4) is connected to the plug (2) and the other end passes through the valve cover (5) and is connected to the operating mechanism (6); the operating mechanism (6) is used to drive the plug (2) to rise and fall; the handle (7) is connected to the middle of the valve stem (4); the handle (7) is used to drive the plug (2) to rotate, characterized in that: The valve body (1) is also provided with a scraper assembly. The scraper assembly includes a scraper sleeve (9) disposed in the valve body (1). The scraper sleeve (9) is provided with an annular scraper (10) that is adapted to the outer peripheral wall of the valve (2) at one end near the valve seat (3). When the handle (7) drives the valve (2) to rotate, the annular scraper (10) and the valve (2) remain in contact.

2. The lift-type plug valve according to claim 1, characterized in that: The scraper sleeve (9) is also provided with a grid-shaped scraper (11) that is adapted to the outer peripheral wall of the valve (2). The grid-shaped scraper (11) is located on the inner periphery of the annular scraper (10), and the grid-shaped scraper (11) has several flow holes (12) that communicate with the flow channel (8). When the handle (7) drives the valve (2) to rotate, the annular scraper (10) and the grid-shaped scraper (11) simultaneously abut against the valve (2).

3. A lift-type plug valve according to claim 1, characterized in that: The inner wall of one side of the scraper sleeve (9) is provided with a guide slope (13).

4. A lift-type plug valve according to claim 1, characterized in that: The scraper assembly also includes a metal sleeve (14) which is fitted over the outside of the scraper sleeve (9), and the outer periphery of the annular scraper (10) extends between the metal sleeve (14) and the stopcock (2).

5. A lift-type plug valve according to claim 4, characterized in that: It also includes a mounting sleeve (15) that is threaded to the inner wall of the valve body (1), and the scraper assembly is sandwiched between the mounting sleeve (15) and the plug (2).

6. A lift-type plug valve according to claim 5, characterized in that: One end of the mounting sleeve (15) extends between the scraper sleeve (9) and the inner wall of the valve body (1), and the mounting sleeve (15) has a mounting ring groove (16) on the side facing the inner wall of the valve body (1). An elastic element (17) is fitted inside the mounting ring groove (16). One end of the elastic element (17) abuts against the mounting sleeve (15) and the other end abuts against the metal sleeve (14).

7. A lift-type plug valve according to claim 5, characterized in that: The mounting sleeve (15) has several quick-release grooves (18) on the outer periphery of the end away from the metal sleeve (14).

8. A lift-type plug valve according to claim 2, characterized in that: Both the annular scraper (10) and the grid scraper (11) are made of silicone.

Images