A pneumatic stop valve stem

Abstract

The utility model discloses a valve stem of a pneumatic stop valve, which relates to the field of valve stems, including a rod body 1, wherein the rod body 1 is movably sleeved with a rod body 2, the rod body 2 matches the mounting groove reserved inside the rod body 1, and the lower end of the rod body 2 is fixedly connected with a plunger, and also includes: a limit assembly. The utility model toggles a pulling block, and pulls the movable block toward the inside of the movable groove through a pull rope, which is convenient for subsequent rotation of a cylinder, and the rotating cylinder drives the plunger fixedly connected to the bottom of the cylinder and the lower end of the rod body to change, thereby facilitating the adjustment of the length between the entire rod body 1 and the rod body 2, and facilitating the entire rod body to adapt to stop valves of different sizes. Since the threaded connection has self-locking properties, it is ensured that the overall length of the entire valve stem can be fixed, and at the same time, loosening the pulling block prompts the spring to reset and push the movable block to match the corresponding engaging groove again, thereby ensuring the secondary length limitation of the rod body 1 and the rod body 2.

Description

Technical Field

[0001] The utility model relates to the field of valve stems, in particular to a valve stem of a pneumatic stop valve. Background Art

[0002] Pneumatic stop valve is a commonly used pipeline valve. This type of valve has the characteristics of simple structure, reliable operation, low failure rate and easy maintenance. Therefore, it is widely used. It uses a pneumatic device to drive the switch of the valve to control the flow and stop of the fluid. The valve stem is an important component of the valve and is used for transmission.

[0003] The existing Chinese patent publication number is: CN220646955U, which discloses a pneumatic stop valve stem, including a rod body and a screw connected to its lower end, a valve disc is provided below the rod body, a bolt hole is provided on the valve disc, the lower end of the screw is screwed into the bolt hole, and a connecting sleeve 2 located outside the valve disc is adjusted on the outside of the rod body, a limiting component is provided between the connecting sleeve 2 and the rod body, the limiting component includes a plug plate, a plug rod and a spring, the plug rod is used to limit the rod body, a reinforcement component is provided on the upper end of the outer side of the rod body, the inner wall of the connecting sleeve 2 is fitted with the outer wall of the rod body and the upper end of the outer wall of the valve disc, the left and right ends of the inner side of the connecting sleeve 2 are provided with accommodating cavities, the left and right sides of the outer wall of the connecting sleeve 2 are provided with grooves, two plug plates are provided and are respectively engaged with the two grooves, and two plug rods are provided and are respectively connected to the inner ends of the two plug plates; in the case where no through hole is provided on the valve disc and the rod body, the utility model effectively ensures the stability of the connection between the rod body and the valve disc through the provision of the screw and the limiting component.

[0004] The above-mentioned valve stem also has the following problems during use: the length of the above-mentioned valve stem is relatively fixed. If the valve position is far away from the operating position, a connecting rod needs to be processed, which is equivalent to the role of the valve stem. This makes it inconvenient to adjust the overall length of the valve stem, and it is necessary to find a suitable connecting rod, which makes the operation more cumbersome.

[0005] Therefore, it is necessary to invent a pneumatic stop valve stem to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a pneumatic stop valve stem to solve the problem that the length of the valve stem is relatively fixed as mentioned in the background technology. If the valve position is far away from the operating position, a connecting rod needs to be processed, which is equivalent to the role of the valve stem. This makes it inconvenient to adjust the overall length of the valve stem and requires finding a suitable connecting rod, which makes the operation more complicated.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic stop valve stem, comprising a rod body 1, wherein the rod body 1 is movably sleeved with a rod body 2, the rod body 2 matches the mounting groove reserved inside the rod body 1, and the lower end of the rod body 2 is fixedly connected with a plunger, and the top wall of the plunger is fixedly connected with a cylinder, the cylinder is sleeved on the outer periphery of the rod body 2, and the cylinder matches the cylinder groove reserved inside the rod body 1, and also includes:

[0008] The limiting component is provided with a movable groove inside the second rod body, and the movable groove is movably connected with a movable block through a spring, and one end of the movable block matches the engaging groove, and the other end of the movable block is connected with a pull rope.

[0009] Preferably, the outer ring of the cylinder is provided with threads, and the cylinder and the cylinder groove are connected by threads.

[0010] Preferably, there are four movable blocks, and the four movable blocks are distributed in a ring shape with equal angles, and the outer wall of the movable block is in contact with and slidably connected to the inner wall of the movable groove.

[0011] Preferably, the movable block is in a "T" shape, and the "T"-shaped end of the movable block is always located inside the movable groove which is also in a "T" shape, and the end of the movable block away from the movable groove passes through the interior of the cylinder.

[0012] Preferably, a group of the engaging grooves is arranged in a ring shape with a plurality of equal angles, and the plurality of groups of the engaging grooves arranged in a ring shape are arranged at equal intervals from top to bottom inside the rod body.

[0013] Preferably, there are four pull ropes, and one end of the four pull ropes are fixedly connected to the "T"-shaped ends of the four movable blocks respectively, and the other ends of the four pull ropes are rolled into a rope that passes through the second rod body and the inside of the plunger and is fixedly connected to the pulling block, and the pulling block is movably installed in an embedded manner at the bottom of the plunger.

[0014] Preferably, the spring is located inside the movable groove, and two ends of the spring are fixedly connected to the inner wall of the movable groove and the "T"-shaped end of the movable block respectively.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] The utility model toggles the pulling block and pulls the movable block toward the inside of the movable groove through the pulling rope, which facilitates the subsequent rotation of the cylinder. The rotating cylinder drives the plunger fixedly connected to the bottom of the cylinder and the lower end of the rod body to change, thereby facilitating the adjustment of the length between the entire rod body one and the rod body two, and facilitating the entire rod body to adapt to stop valves of different sizes. Since the threaded connection has self-locking properties, it is ensured that the overall length of the entire valve stem can be fixed. At the same time, loosening the pulling block prompts the spring to reset and push the movable block to match the corresponding engaging groove again, thus ensuring that the secondary length limitation of the rod body one and the rod body two is performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0019] Figure 2 This is an exploded view of the connection structure between the rod body 1 and the rod body 2 of the utility model from a first perspective;

[0020] Figure 3 It is an exploded view from a second perspective of the connecting structure of the rod body 1 and the rod body 2 of the utility model;

[0021] Figure 4 It is a three-dimensional diagram of the cylinder and the rod body 2 (partially cut away state) of the utility model;

[0022] Figure 5 It is a top plan view of the rod body 1 and the rod body 2 (partially cut away) of the utility model;

[0023] Figure 6 It is a stereoscopic view of the rod body 1 (partially cut away) of the utility model.

[0024] Description of reference numerals:

[0025] 1. Rod body 1; 2. Rod body 2; 3. Mounting groove; 4. Cylinder; 5. Cylinder groove; 6. Plunger; 7. Limiting assembly; 71. Movable groove; 72. Movable block; 73. Engaging groove; 74. Pull rope; 75. Spring; 76. Pull block. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figure 1-6 The valve stem of a pneumatic stop valve shown in the figure comprises a rod body 1, a rod body 2 is movably sleeved inside the rod body 1, the rod body 2 matches the mounting groove 3 reserved inside the rod body 1, and a plunger 6 is fixedly connected to the lower end of the rod body 2, and a cylinder 4 is fixedly connected to the top wall of the plunger 6, the cylinder 4 is sleeved on the outer periphery of the rod body 2, and the cylinder 4 matches the cylinder groove 5 reserved inside the rod body 1, and also includes:

[0028] The limiting component 7 has a movable groove 71 inside the rod body 2, and a movable block 72 is movably connected to the inside of the movable groove 71 through a spring 75, and one end of the movable block 72 matches the engaging groove 73, and the other end of the movable block 72 is connected to a pull rope 74.

[0029] The outer ring of the cylinder 4 is provided with a thread, and the cylinder 4 is threadedly connected to the cylinder groove 5, which is convenient for rotating the cylinder 4, driving the distance between the plunger 6 fixedly connected to the bottom of the cylinder 4 and the lower end of the rod body 1 to change.

[0030] There are four movable blocks 72 , which are arranged in a circular shape and are distributed at equal angles. The outer wall of the movable block 72 is in contact with the inner wall of the movable groove 71 and is slidably connected.

[0031] The movable block 72 is in a "T" shape, and the "T"-shaped end of the movable block 72 is always located inside the movable groove 71 which is also in a "T" shape, and the end of the movable block 72 away from the movable groove 71 passes through the inside of the cylinder 4 to ensure the stability of the movable block 72.

[0032] A group of engaging grooves 73 are distributed in a ring shape at equal angles, and the groups of engaging grooves 73 distributed in a ring shape are arranged at equal intervals from top to bottom inside the rod body 1. In this way, multiple groups of engaging grooves 73 are provided to ensure that the movable block 72 is conveniently matched with the engaging grooves 73 when it is at different heights and at different angles.

[0033] There are four pull ropes 74, and one end of the four pull ropes 74 is fixedly connected to the "T"-shaped ends of the four movable blocks 72 respectively, and the other ends of the four pull ropes 74 are rolled into a rope that penetrates the rod body 2 and the inside of the plunger 6 and is fixedly connected to the pulling block 76, and the pulling block 76 is movably installed at the bottom of the plunger 6, so that the movable block 72 can be driven to move through the pull rope 74 after the pulling block 76 is moved.

[0034] The spring 75 is located inside the movable groove 71 , and the two ends of the spring 75 are fixedly connected to the inner wall of the movable groove 71 and the “T”-shaped end of the movable block 72 , respectively, to facilitate the subsequent resetting movement of the movable block 72 .

[0035] Working principle: When using a pneumatic stop valve stem, first, by toggling the pull block 76, the pull block 76 mobilizes the pull rope 74 to pull the movable block 72 fixedly connected to the pull rope 74 toward the inside of the movable groove 71. At this time, the end of the movable block 72 leaves the matching engaging groove 73 preset inside the rod body 1. At this time, the cylinder 4 can be rotated. By rotating the cylinder 4, the cylinder 4 is threadedly connected to the cylinder groove 5 reserved inside the rod body 1. In this way, in the process of rotating the cylinder 4, the distance between the plunger 6 fixedly connected to the bottom of the cylinder 4 and the lower end of the rod body 1 is changed, thereby facilitating the adjustment of the length between the entire rod body 1 and the rod body 2, so that the entire rod body can adapt to stop valves of different sizes. The valve is provided with a self-locking property because the threaded connection has a self-locking property, which ensures that the overall length of the entire valve stem can be fixed. After the length between the rod body 1 and the rod body 2 is adjusted to an appropriate length, the pulling block 76 is released at the same time to prompt the spring 75 to push the movable block 72 to re-match with the corresponding engaging groove 73, thereby ensuring that the rod body 1 and the rod body 2 are subject to secondary length limitation. At the same time, because the multiple groups of annular engaging grooves 73 are arranged at equal intervals from top to bottom, when the distance between the plunger 6 fixedly connected to the bottom of the cylinder 4 and the lower end of the rod body 1 changes by the same amount, the matching engagement of the movable block 72 and the engaging groove 73 can be facilitated, and at the same time, it is convenient to adjust the length between the rod body 1 and the rod body 2 by the same amount.

[0036] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pneumatic stop valve stem, comprising a stem body (1), characterized in that: The rod body 1 (1) is movably sleeved with the rod body 2 (2), the rod body 2 (2) matches the mounting groove (3) reserved inside the rod body 1 (1), and the lower end of the rod body 2 (2) is fixedly connected with a plunger (6), and the top wall of the plunger (6) is fixedly connected with a cylinder (4), the cylinder (4) is sleeved on the outer periphery of the rod body 2 (2), and the cylinder (4) matches the cylindrical groove (5) reserved inside the rod body 1 (1), and further comprises: A limit assembly (7), wherein a movable groove (71) is provided inside the second rod body (2), and a movable block (72) is movably connected inside the movable groove (71) via a spring (75), and one end of the movable block (72) matches the engaging groove (73), and the other end of the movable block (72) is connected to a pull rope (74).

2. A pneumatic stop valve stem according to claim 1, characterized in that: The outer ring of the cylinder (4) is provided with threads, and the cylinder (4) and the cylinder groove (5) are connected by threads.

3. A pneumatic stop valve stem according to claim 1, characterized in that: The movable blocks (72) are provided in four numbers, and the four movable blocks (72) are distributed in a ring shape at equal angles, and the outer wall of the movable block (72) is in contact with and slidably connected to the inner wall of the movable groove (71).

4. A pneumatic stop valve stem according to claim 3, characterized in that: The movable block (72) is in a "T" shape, and the "T"-shaped end of the movable block (72) is always located inside the movable groove (71) which is also in a "T" shape, and the end of the movable block (72) away from the movable groove (71) passes through the interior of the cylinder (4).

5. The pneumatic stop valve stem according to claim 1, characterized in that: A group of the engaging grooves (73) is arranged in a ring shape with a plurality of equal angles, and the plurality of groups of the engaging grooves (73) are arranged at equal intervals from top to bottom inside the rod body (1).

6. A pneumatic stop valve stem according to claim 1, characterized in that: The pull ropes (74) are provided in four numbers, and one end of the four pull ropes (74) is fixedly connected to the "T"-shaped ends of the four movable blocks (72) respectively, and the other end of the four pull ropes (74) is rolled into a rope that penetrates the rod body (2) and the inside of the plunger (6) and is fixedly connected to the pulling block (76), and the pulling block (76) is movably mounted on the bottom of the plunger (6).

7. The pneumatic stop valve stem according to claim 1, characterized in that: The spring (75) is located inside the movable groove (71), and the two ends of the spring (75) are fixedly connected to the inner wall of the movable groove (71) and the "T"-shaped end of the movable block (72) respectively.

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