Screw thread ball valve with replaceable valve rod

Abstract

The utility model relates to the technical field of screw thread ball valves, and discloses a screw thread ball valve with a replaceable valve rod, which comprises a valve body, the surface of the valve body is fixedly connected with the valve rod, the top end of the valve rod is provided with a dismounting mechanism, a shell is arranged in the dismounting mechanism, and the top of the dismounting mechanism is provided with a handle. Two arc-shaped blocks are pressed by hands through a dismounting mechanism, so that the two arc-shaped blocks move in opposite directions, two first sliding blocks move in opposite directions, a second sliding block further moves in opposite directions, two fixed blocks can slide in a first clamping groove, and the fixed blocks are driven away from a second clamping groove; and a new valve body is inserted into the surface of the first limiting block, then two arc-shaped blocks are loosened, and two fixing blocks slide into a second clamping groove due to the elasticity, so that the valve rod is fixed, the mechanism can replace the valve body more conveniently, the valve body is more stable to use after being replaced, and the replacement efficiency is improved. And falling cannot occur.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded ball valves, in particular to a threaded ball valve with a replaceable valve stem. Background Art

[0002] The threaded ball valve is a common valve with the following main features: small fluid resistance, simple structure, small size, light weight, good sealing, easy operation, convenient maintenance, and when fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the medium will not cause erosion of the valve sealing surface when passing through. In addition, the sealing surface material of the threaded ball valve is widely plastic, so it has also been widely used in vacuum systems.

[0003] According to patent CN 109084074 A, a floating ball valve with a replaceable valve stem includes a square limit rod, a square limit groove, a valve handle, a connecting seat, a guide groove, a positioning pin, a bayonet, a rebound elastic tube and a groove. The square limit rod is welded to the middle position of the upper end face of the valve stem, the square limit groove is arranged in the middle of the lower side face of the connecting seat, the valve handle is installed on the upper end face of the connecting seat, the guide groove is arranged in the middle of the left side face in the square limit groove, the positioning pin is installed in the groove, the bayonet is arranged on the left part of the outer peripheral face of the connecting seat, and the right end of the bayonet is connected to the guide groove, the right end of the rebound spring is welded to the right side face in the groove, and the left end of the rebound elastic tube is welded to the right end face of the positioning pin, and the groove is arranged in the middle of the left end face of the square limit rod.

[0004] This patent assembles a square limit rod in a square limit groove, clamps the connecting column on the valve stem, and then uses the rebound force of the return spring to push the positioning pin into the bayonet, and then fix the positioning pin in the bayonet. At the same time, the positioning pin fixes the connecting seat on the valve stem, thereby realizing the rapid assembly function of the valve stem. However, the positioning pin of this patent is arc-shaped, which will cause the valve stem to be unstable and easy to fall off. Utility Model Content

[0005] The utility model aims to provide a threaded ball valve with a replaceable valve stem, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a threaded ball valve with a replaceable valve stem, comprising a valve body, a valve stem fixedly connected to the surface of the valve body, a disassembly mechanism provided at the top of the valve stem, a housing provided inside the disassembly mechanism, and a handle provided at the top of the disassembly mechanism;

[0007] The disassembly mechanism comprises a clamping assembly and a fixing assembly, wherein the clamping assembly is arranged at the top of the valve stem, and the fixing assembly is arranged inside the clamping assembly.

[0008] Preferably, the clamping assembly includes a first limit block and a second limit block, the top of the first limit block is fixedly connected to the top of the valve stem, the bottom of the second limit block is provided with a limit groove, and the top of the second limit block is fixedly connected to a connecting block.

[0009] Preferably, the second limit block is slidably connected to the surface of the first limit block through a limit groove, the top of the connection block is fixedly connected to the left side of the bottom of the handle, and the bottom of the second limit block is fixedly connected to the top of the shell.

[0010] Preferably, the fixing assembly includes a first slide groove, the first slide groove is opened on the surface of the second limit block, a second slide groove is opened on the right side of the first slide groove, a first slider is slidably connected in the first slide groove, a second slider is slidably connected in the second slide groove, a first clamping groove is opened on the left side of the second slide groove, a fixed block is slidably connected in the first clamping groove, a second clamping groove is opened on the right side of the first limit block corresponding to the first clamping groove, a spring is fixedly connected to the right side of the second slider, and an arc block is fixedly connected to the left end of the first slider.

[0011] Preferably, the surface of the second sliding block is slidably connected in the second sliding groove, the left side of the second sliding block is fixedly connected to the right side of the fixed block, and the right end of the spring is fixedly connected to the right side of the second sliding groove.

[0012] Preferably, there are two groups of fixing components, which are arranged on the surface of the second limiting block around the second limiting block.

[0013] Compared with the prior art, the utility model provides a threaded ball valve with a replaceable valve stem, which has the following beneficial effects:

[0014] The threaded ball valve with replaceable valve stem has a disassembly mechanism, and the two arc blocks are pressed by hand to move the two arc blocks toward each other, thereby causing the two first sliders to move toward each other, and further causing the second slider to move toward each other, and the two fixed blocks will slide in the first slot, thereby causing the fixed blocks to leave the second slot, thereby extracting the second limit block from the surface of the first limit block, inserting a new valve body into the surface of the first limit block, and then loosening the two arc blocks. The two fixed blocks will slide into the second slot due to the elastic force passing through, thereby fixing the valve stem. The mechanism can make it more convenient to replace the valve body, and the valve body will be more stable to use after replacement and will not fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0016] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a three-dimensional schematic diagram of the structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structural clamping assembly of the utility model;

[0019] Figure 4 It is a schematic diagram of the structural fixing components of the utility model.

[0020] In the figure: 1. valve body; 2. valve stem; 3. shell; 4. handle; 5. disassembly mechanism; 51. snap-fit ​​assembly; 511. first limit block; 512. second limit block; 513. limit groove; 514. connecting block; 52. fixing assembly; 521. first slide groove; 522. second slide groove; 523. first slider; 524. second slider; 525. first slot; 526. fixing block; 527. second slot; 528. spring; 529. arc block. DETAILED DESCRIPTION

[0021] 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.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The utility model provides the following technical solutions:

[0024] Embodiment 1

[0025] See also Figure 1-4 A threaded ball valve with a replaceable valve stem comprises a valve body 1, a valve stem 2 is fixedly connected to the surface of the valve body 1, a disassembly mechanism 5 is arranged at the top of the valve stem 2, a housing 3 is arranged inside the disassembly mechanism 5, and a handle 4 is arranged at the top of the disassembly mechanism 5;

[0026] The disassembly mechanism 5 includes a clamping assembly 51 and a fixing assembly 52 . The clamping assembly 51 is arranged on the top of the valve stem 2 , and the fixing assembly 52 is arranged inside the clamping assembly 51 .

[0027] The clamping assembly 51 includes a first limit block 511 and a second limit block 512 . The top of the first limit block 511 is fixedly connected to the top of the valve stem 2 . The bottom of the second limit block 512 is provided with a limit groove 513 . The top of the second limit block 512 is fixedly connected to a connecting block 514 .

[0028] The second limiting block 512 is slidably connected to the surface of the first limiting block 511 through the limiting groove 513 , the top of the connecting block 514 is fixedly connected to the left side of the bottom of the handle 4 , and the bottom of the second limiting block 512 is fixedly connected to the top of the shell 3 .

[0029] The fixing component 52 includes a first slide groove 521, the first slide groove 521 is opened on the surface of the second limit block 512, a second slide groove 522 is opened on the right side of the first slide groove 521, a first slider 523 is slidably connected in the first slide groove 521, a second slider 524 is slidably connected in the second slide groove 522, a first clamping groove 525 is opened on the left side of the second slide groove 522, a fixing block 526 is slidably connected in the first clamping groove 525, a second clamping groove 527 is opened on the right side of the first limit block 511 corresponding to the first clamping groove 525, a spring 528 is fixedly connected to the right side of the second slider 524, and an arc block 529 is fixedly connected to the left end of the first slider 523.

[0030] The surface of the second slider 524 is slidably connected to the second slide groove 522 , the left side of the second slider 524 is fixedly connected to the right side of the fixing block 526 , and the right end of the spring 528 is fixedly connected to the right side of the second slide groove 522 .

[0031] There are two sets of fixing components 52 , which are arranged on the surface of the second limiting block 512 around the second limiting block 512 as the center.

[0032] In actual operation, when this device is used, the two arc blocks 529 are pressed by hand to move the two arc blocks 529 toward each other, thereby causing the two first sliders 523 to move toward each other, and further causing the second slider 524 to move toward each other. The two fixed blocks 526 will slide in the first slot 525, thereby causing the fixed blocks 526 to move away from the second slot 527, thereby pulling the second limit block 512 out of the surface of the first limit block 511, and inserting the new valve body 1 into the surface of the first limit block 511. After that, the two arc blocks 529 are released, and the two fixed blocks 526 will slide into the second slot 527 due to the elastic force, thereby fixing the valve stem 2.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A threaded ball valve with a replaceable valve stem, comprising a valve body (1), characterized in that: The valve body (1) has a valve stem (2) fixedly connected to its surface, a disassembly mechanism (5) is provided at the top of the valve stem (2), a housing (3) is provided inside the disassembly mechanism (5), and a handle (4) is provided at the top of the disassembly mechanism (5); The disassembly mechanism (5) comprises a clamping assembly (51) and a fixing assembly (52), wherein the clamping assembly (51) is arranged on the top of the valve stem (2), and the fixing assembly (52) is arranged inside the clamping assembly (51); The fixing component (52) comprises a first slide groove (521), wherein the first slide groove (521) is provided on the surface of the second limiting block (512), a second slide groove (522) is provided on the right side of the first slide groove (521), a first slider (523) is slidably connected to the first slide groove (521), a second slider (524) is slidably connected to the second slide groove (522), a first clamping groove (525) is provided on the left side of the second slide groove (522), a fixing block (526) is slidably connected to the first clamping groove (525), a second clamping groove (527) is provided on the right side of the first limiting block (511) corresponding to the first clamping groove (525), a spring (528) is fixedly connected to the right side of the second slider (524), and an arc block (529) is fixedly connected to the left end of the first slider (523).

2. A threaded ball valve with replaceable valve stem according to claim 1, characterized in that: The clamping assembly (51) comprises a first limit block (511) and a second limit block (512); the top of the first limit block (511) is fixedly connected to the top of the valve stem (2); the bottom of the second limit block (512) is provided with a limit groove (513); the top of the second limit block (512) is fixedly connected to a connecting block (514).

3. A threaded ball valve with replaceable valve stem according to claim 2, characterized in that: The second limit block (512) is slidably connected to the surface of the first limit block (511) via the limit groove (513); the top of the connection block (514) is fixedly connected to the left side of the bottom of the handle (4); and the bottom of the second limit block (512) is fixedly connected to the top of the shell (3).

4. A threaded ball valve with replaceable valve stem according to claim 1, characterized in that: The surface of the second sliding block (524) is slidably connected to the second sliding groove (522), the left side of the second sliding block (524) is fixedly connected to the right side of the fixed block (526), ​​and the right end of the spring (528) is fixedly connected to the right side of the second sliding groove (522).

5. A threaded ball valve with replaceable valve stem according to claim 1, characterized in that: The fixing components (52) have two groups and are arranged on the surface of the second limiting block (512) around the second limiting block (512) as the center.

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