Manually opened and closed plug valve

Abstract

The utility model discloses a plug valve capable of being opened and closed manually, relates to the technical field of plug valves, and solves the problems that a handle structure of the plug valve is limited in torque coping capacity and difficult to adapt to space limitation scenes. The valve rod is sleeved with a T-shaped rod sleeve, an insertion hole transversely penetrates through the rod sleeve, and a handle rod with the selectable length is detachably inserted into the insertion hole. A heightening rod is further arranged above the rod sleeve, the bottom end of the heightening rod is detachably and fixedly connected with the rod sleeve through a fixing structure, the top end of the heightening rod is integrally connected with a horizontal sleeve, and the handle rod can be inserted into the horizontal sleeve to be in linkage connection with the horizontal sleeve. The handle rod with the proper length is selected to rotate the valve rod according to different torque requirements, an operator can select whether to install the heightening rod or not according to the site space condition, the operation height and angle are changed after the handle rod is inserted into the horizontal sleeve, space obstacles are effectively avoided, it is guaranteed that operation actions can be smoothly carried out in a narrow space, and operation efficiency is improved. Manual opening and closing of the plug valve are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plug valves, in particular to a manually opened and closed plug valve. Background Art

[0002] The plug valve is a commonly used valve type, which is widely used in many industrial fields such as petroleum, chemical, and natural gas. The plug valve controls the flow of fluid by rotating the valve core (plug). Its structural characteristics determine that a certain torque needs to be applied during the opening or closing process. In the prior art, the manual opening method of the plug valve is usually not a handwheel, but a handle for rotating operation. The traditional handle is generally fixedly connected to the valve stem. This structure has the following problems:

[0003] First, due to its structure and working principle, the plug valve requires a relatively large opening torque under some working conditions. When the torque is large, the handle of a fixed length directly connected to the valve stem may not provide enough force to easily rotate the valve stem, making it difficult for operators to open or close the plug valve. This problem is particularly prominent in some scenarios that require high operating force, and may even affect normal industrial production processes or equipment maintenance operations.

[0004] Secondly, in some special working scenarios, such as ship cabins, underground pipe wells, and compact spaces inside mechanical equipment, traditional handles require a large operating space. When operators use this fixed-structure handle, they often find it difficult to perform operating actions due to insufficient space. In scenarios such as piping systems between narrow equipment, inside equipment, or underground operations with limited space, the space required for operation cannot be met at all, often making it difficult for operators to smoothly turn the handle into place, greatly limiting the normal use of the plug valve and causing many inconveniences to on-site operations. Additional disassembly or adjustment work may even be required to create sufficient operating space, which not only increases the workload, but also may bring additional safety risks. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the problems in the prior art that the handle structure of the plug valve has limited torque handling capability and is difficult to adapt to space-limited scenarios, the utility model provides a manually opened and closed plug valve.

[0006] The technical solution of the utility model includes a valve stem, a "T"-shaped rod sleeve is sleeved on the valve stem, the rod sleeve is linked to the valve stem, an insertion hole is horizontally penetrated in the rod sleeve, and a handle rod with optional length can be detachably inserted into the insertion hole; a heightening rod is also arranged above the rod sleeve, the bottom end of the heightening rod is detachably fixedly connected to the rod sleeve through a fixing structure, the top end of the heightening rod is integrally connected with a horizontal sleeve, and the handle rod can be inserted into the horizontal sleeve to form a linkage connection with the horizontal sleeve.

[0007] By adopting the above technical solution, a "T"-shaped rod sleeve is sleeved on the valve stem, so that a handle rod with optional length can be easily inserted or removed, so that a handle rod of appropriate length can be selected to rotate the valve stem according to different torque requirements; and a heightening rod is arranged above the rod sleeve, and a horizontal sleeve is arranged at the top of the heightening rod for the handle rod to be inserted and linked, which adapts to special space limitation scenes such as ship cabins and underground pipeline wells. The operator can choose whether to install the heightening rod according to the space conditions on site. If installed, the operating height and angle are changed after the handle rod is inserted into the horizontal sleeve, which effectively avoids space obstacles and ensures that the operation can be smoothly performed in a small space, thereby realizing manual opening and closing of the plug valve.

[0008] In a possible design, the rod sleeve includes a horizontal transverse sleeve portion and a longitudinal longitudinal sleeve portion, the insertion hole is opened in the horizontal direction on the transverse sleeve portion, and the longitudinal sleeve portion is provided with a longitudinal hole for the longitudinal insertion of the heightening rod; the fixing structure includes a side hole opened in the transverse sleeve portion and a prism fixed to the outer periphery of the heightening rod, the side hole is opened on the outer wall of the transverse sleeve portion from the top to the center along the radial direction of the transverse sleeve portion, the prism is adapted to the shape of the side hole and the prism is placed in the side hole to form relative fixation in the rotation direction of the valve stem.

[0009] With the above design, a plug hole is provided in the horizontal sleeve for inserting the handle rod, which ensures that the handle rod can stably transmit the rotational force in the horizontal direction and drive the valve stem to rotate; the longitudinal longitudinal hole is for the longitudinal insertion of the heightening rod, which is used for positioning the heightening rod; and the setting of the fixed structure ensures that after the heightening rod is installed, the cooperation between the prism and the side hole forms a reliable relative fixation in the rotation direction of the valve stem, so that the heightening rod can rotate and displace synchronously with the rod sleeve during operation, so that the rotational force applied by the operator through the handle rod can act on the valve stem, realizing the smooth opening and closing of the plug valve; on the other hand, this detachable fixing method facilitates the rapid installation and disassembly of the heightening rod, and meets the instant adjustment requirements of the operating space and height under different working conditions.

[0010] In a possible design, the fixing structure also includes a pin rod and a pin hole. The pin hole is opened on the outer wall of the transverse sleeve from the top to the center along the radial direction of the transverse sleeve and is located on both axial sides of the side hole. The pin rod is fixedly connected to the prism and is inserted into the pin hole when the heightening rod is installed to form relative fixation in the rotation direction of the valve stem.

[0011] With the above design, when the heightening rod is installed in place and the prism is embedded in the side hole, the pin rod fixed on the prism is just inserted into the pin hole to form a multi-point limit fixation, which greatly limits the slight shaking or displacement tendency of the heightening rod during rotation, and ensures that the rotational force transmitted from the handle rod to the valve stem through the heightening rod always maintains consistent direction and stable force, avoiding operation jams or failures due to looseness between components, and further enhances the synchronous linkage between the heightening rod and the rod sleeve in the rotation direction of the valve stem, especially under high torque operation or frequent opening and closing of the plug valve, to ensure the continuity and reliability of the operation, and improve the accuracy and safety of the manual operation of the entire valve.

[0012] In a possible design, the side holes and the prisms form an inverted trapezoidal shape along the longitudinal section of the transverse sleeve portion.

[0013] The above design utilizes the mechanical properties of the trapezoidal structure. When installing the heightening rod, the inverted trapezoidal prism can easily slide in along the shape of the side hole, making it easy to operate. During use, when the valve stem is subjected to a large torque force, the oblique sides of the inverted trapezoidal structure squeeze each other, and the friction force generated can effectively resist the displacement tendency of the heightening rod in the radial direction, making the connection between the heightening rod and the rod sleeve tighter and more stable.

[0014] In a possible design, friction patterns are provided on the contact surfaces of the side hole and the prism.

[0015] The above design increases the friction between the side hole and the prism, which helps prevent slipping or sliding during operation and ensures smooth and safe opening and closing of the valve even under high pressure or high torque conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0017] Figure 2 It is an exploded view of a specific embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the pole sleeve, heightening pole, etc. of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the combination of the rod sleeve and the handle rod of the utility model;

[0020] Among them, 1. valve stem; 2. rod sleeve; 21. socket; 22. horizontal sleeve; 23. longitudinal sleeve; 231. longitudinal hole; 3. handle rod; 4. heightening rod; 41. horizontal sleeve; 5. fixing structure; 51. side hole; 52. prism; 53. pin rod; 54. pin hole; 521. friction pattern. DETAILED DESCRIPTION

[0021] like Figure 4 The manually opened and closed plug valve shown in the figure includes a valve stem 1, a "T"-shaped rod sleeve 2 is sleeved on the valve stem 1, the rod sleeve 2 is sleeved on the tenon of the valve stem 1 to form a linkage with the valve stem 1, and a plug hole 21 is horizontally penetrated in the rod sleeve 2, and a handle rod 3 with optional length can be removably inserted into the plug hole 21. The problem of limited torque handling ability is solved. Because the traditional handle is fixed in length and directly connected to the valve stem 1, it cannot provide sufficient force arm when the torque is large under some working conditions. The utility model adopts a removable and insertable handle rod 3 with optional length, and the operator can select a handle rod 3 of a suitable length according to the actual required torque. When encountering a large torque situation, selecting a longer handle rod 3 can effectively increase the length of the force arm, so that the valve stem 1 can be easily rotated, overcoming the defect that the traditional handle is difficult to operate when the torque is large, and ensuring the normal opening and closing of the plug valve.

[0022] like Figures 1 to 3 As shown, a detachable heightening rod 4 is also provided above the rod sleeve 2, and the bottom end of the heightening rod 4 is detachably fixedly connected to the rod sleeve 2 through a fixing structure 5, and the top of the heightening rod 4 is integrally connected with a horizontal sleeve 41, and the handle rod 3 can be inserted into the horizontal sleeve 41 to form a linkage connection with the horizontal sleeve 41. In special working conditions such as ship cabins, underground pipeline wells, and compact spaces inside mechanical equipment, the traditional handle requires a large operating space and is inconvenient to operate. The rod sleeve 2 of the utility model is detachably connected to the handle rod 3, and the heightening rod 4 is also detachably connected to the rod sleeve 2, and a horizontal sleeve 41 is provided at the top of the heightening rod 4 for inserting the handle rod 3. This structure allows the operator to flexibly adjust the combination of the handle rod 3 and the heightening rod 4 according to the actual available space in an environment with limited space, reducing the space occupied by the overall structure, allowing the operator to smoothly turn the handle into place in a small space, facilitating the operation of the plug valve, avoiding the difficulty of operation caused by insufficient space, reducing the workload of additional disassembly or adjustment work, and reducing safety risks.

[0023] The rod sleeve 2 includes a horizontal sleeve portion 22 and a longitudinal sleeve portion 23. The insertion hole 21 is opened on the horizontal sleeve portion 22 in the horizontal direction. The longitudinal sleeve portion 23 is opened with a longitudinal hole 231. The insertion hole 21 and the longitudinal hole 231 are used to insert the handle rod 3 and the heightening rod 4 respectively. The fixing structure 5 includes a side hole 51 opened on the horizontal sleeve portion 22 and a prism 52 fixed to the outer periphery of the heightening rod 4. The side hole 51 is opened on the outer wall of the horizontal sleeve portion 22 from the top to the center along the radial direction of the horizontal sleeve portion 22. The prism 52 is matched with the side hole 51 in shape and the prism 52 is placed in the side hole 51 to form a relative fixation in the rotation direction of the valve stem 1. The design of the prism 52 and the side hole 51 being adapted in shape enables the prism 52 to accurately fit into the side hole 51 after the heightening rod 4 is inserted into the longitudinal hole 231. This matching mode not only facilitates the installation and removal of the heightening rod 4, but also enables the relative abutment and fixation of the prism 52 and the side hole 51 in the rotation direction during the rotation of the valve stem 1, thereby ensuring the stability of the connection between the heightening rod 4 and the rod sleeve 2, and further ensuring the reliability of the entire handle operation structure, making the operation of the plug valve more stable and smooth. The rod sleeve 2 and the heightening rod 4 can be easily disassembled and replaced, which increases the use range of the entire plug valve.

[0024] The fixing structure 5 also includes a pin rod 53 and a pin hole 54. The pin hole 54 is opened on the outer wall of the transverse sleeve portion 22 from the top to the center along the radial direction of the transverse sleeve portion 22 and is located on both axial sides or one of the sides of the side hole 51. The pin rod 53 is fixedly connected to the prism 52 and inserted into the pin hole 54 when the heightening rod 4 is installed to form a relative fixation in the rotation direction of the valve stem 1. In this way, the design of the pin rod 53 and the pin hole 54 provides an additional fixing method for the connection between the heightening rod 4 and the rod sleeve 2. When the heightening rod 4 is installed, the pin rod 53 is inserted into the pin hole 54, and cooperates with the prism 52 and the side hole 51 to further enhance the fixing effect of the heightening rod 4 in the rotation direction. This multiple fixing method can effectively prevent the heightening rod 4 from loosening or displacement during the rotation of the valve stem 1, ensure the accuracy and stability of the handle operation, and improve the operating performance of the plug valve. The reliable fixing structure 5 ensures that the connection between the various components of the plug valve is tight and stable during long-term use, reduces the probability of failure due to loose components, and improves the safety and durability of the plug valve.

[0025] The side hole 51 and the prism 52 form an inverted trapezoidal shape along the longitudinal section of the transverse sleeve 22. The inverted trapezoidal shape enables the prism 52 to have a guiding effect when inserted into the side hole 51, and the installation process is smoother. At the same time, it is also easier to remove the prism 52 from the side hole 51 during disassembly, which facilitates the maintenance and replacement of the heightening rod 4 and reduces the difficulty and workload of the operation. After installation, the inverted trapezoidal structure can provide better lateral and longitudinal stability. During the rotation of the valve stem 1, the contact area between the prism 52 and the side hole 51 is larger, and the force is more uniform, thereby further enhancing the stability of the connection between the heightening rod 4 and the rod sleeve 2.

[0026] The contact surface between the side hole 51 and the prism 52 is provided with a friction pattern 521. The provision of the friction pattern 521 increases the friction between the contact surface between the side hole 51 and the prism 52, and reduces loosening. During the rotation of the valve stem 1, the relative sliding of the prism 52 in the side hole 51 can be effectively reduced, and the stability of the connection between the heightening rod 4 and the rod sleeve 2 is further improved, ensuring that there will be no loosening or shaking during the operation of the handle, and ensuring the normal operation of the plug valve.

Claims

1. A manually opened and closed plug valve, comprising a valve stem, characterized in that: A "T"-shaped rod sleeve is sleeved on the valve stem, and the rod sleeve is linked to the valve stem. A plug hole is horizontally penetrated in the rod sleeve, and a handle rod with optional length can be detachably inserted into the plug hole; a heightening rod is also arranged above the rod sleeve, and the bottom end of the heightening rod is detachably fixedly connected to the rod sleeve by a fixing structure, and the top end of the heightening rod is integrally connected with a horizontal sleeve, and the handle rod can be inserted into the horizontal sleeve to form a linkage connection with the horizontal sleeve.

2. The manually opened and closed plug valve according to claim 1 is characterized in that: The rod sleeve includes a horizontal transverse sleeve portion and a longitudinal sleeve portion, the insertion hole is opened on the horizontal direction on the transverse sleeve portion, and the longitudinal sleeve portion is provided with a longitudinal hole for the longitudinal insertion of the heightening rod; the fixing structure includes a side hole opened on the transverse sleeve portion and a prism fixed to the outer periphery of the heightening rod, the side hole is opened on the outer wall of the transverse sleeve portion from the top to the center along the radial direction of the transverse sleeve portion, the prism is adapted to the shape of the side hole and the prism is placed in the side hole to form relative fixation in the rotation direction of the valve stem.

3. The manually opened and closed plug valve according to claim 2 is characterized in that: The fixing structure also includes a pin rod and a pin hole. The pin hole is opened on the outer wall of the transverse sleeve from the top to the center along the radial direction of the transverse sleeve and is located on both axial sides of the side hole. The pin rod is fixedly connected to the prism and is inserted into the pin hole when the heightening rod is installed to form relative fixation in the rotation direction of the valve stem.

4. The manually opened and closed plug valve according to claim 2 or 3, characterized in that: The side holes and the prisms form an inverted trapezoidal shape along the longitudinal section of the transverse sleeve portion.

5. The manually opened and closed plug valve according to claim 2 or 3, characterized in that: The contact surfaces of the side hole and the prism are provided with friction lines.

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