Fixed ball valve

Abstract

The embodiment of the utility model discloses a fixed ball valve, and relates to the field of ball valve structures, the fixed ball valve comprises a valve body, a communicating cavity is formed in the valve body, a valve ball is arranged in the communicating cavity, and the valve ball rotates in the communicating cavity to open and close the valve body; a rotating cavity is formed in the valve body, a packing groove is formed in the rotating cavity, the packing groove is formed in the circumferential position of the rotating cavity, a packing gasket is arranged at the bottom of the packing groove, a packing layer is arranged on the packing gasket and located in the packing groove, a first mounting hole is formed in the abutting face, and a second mounting hole is formed in the abutting face. The mounting support is provided with the second mounting hole, and the stud is connected with the first mounting hole and the second mounting hole, so that the mounting support is directly connected to the valve body through the flange and is directly mounted on the rotating cavity through the packing groove, the overall size of the valve body can be greatly reduced, the corresponding weight and production cost are reduced, and the structural space is saved.

Description

Technical Field

[0001] This application relates to the field of ball valve structures, and particularly to a fixed ball valve. Background Art

[0002] As a widely used fluid control device, the ball valve plays a crucial role in various fields such as industrial production, chemical industry, pharmaceutical industry, and water treatment. Its core function is to control the on-off of the fluid by rotating the ball. Due to its compact structure, simple operation, good sealing performance, and small fluid resistance, the ball valve has gradually become an indispensable part of the fluid control field. However, with the continuous progress of technology and the increasing complexity of application requirements, higher requirements are put forward for the airtightness of the ball valve.

[0003] Traditional ball valves mainly consist of components such as valve bodies, valve balls, main valve stems, sealing rings, and flanges. Its working principle is to drive the ball to rotate by rotating the main valve stem, thereby changing the opening and closing state of the fluid passage. In the closed position, the ball is tightly pressed against the valve seat under the mechanical pressure of the main valve stem to form a seal. When opening, the fluid passage is opened by rotating the ball. However, due to the existence of the middle flange structure in this structure, the middle flange structure makes the volume of the ball valve itself larger, and the packing groove is arranged in the middle flange structure, resulting in more occupied space and an increase in the production cost of the ball valve.

[0004] Therefore, providing a ball valve that can reduce the space volume and production cost has become the key to improving product quality and production efficiency. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the present utility model provides a fixed ball valve. By directly installing the packing groove on the rotating cavity, the overall volume of the valve body can be greatly reduced, the corresponding weight and production cost can be reduced, and the structural space can be saved.

[0006] The technical solutions adopted by the present utility model to solve the above technical problems are as follows:

[0007] This application provides a fixed ball valve, including:

[0008] A valve body, a communication cavity is opened in the valve body, a valve ball is arranged in the communication cavity, and the valve ball rotates in the communication cavity to open and close the valve body;

[0009] A rotating cavity is arranged on the valve body, the rotating cavity communicates with the communication cavity, a main valve stem is arranged in the rotating cavity, and the main valve stem is connected to the valve ball through the rotating cavity, so that the main valve stem drives the valve ball to rotate in the communication cavity;

[0010] Wherein, a mounting bracket is provided on the valve body, the mounting bracket is mounted on the valve body through a stud, and the mounting bracket is mounted corresponding to the position of the rotating cavity;

[0011] A fixing cavity is formed in the valve body at a position relative to the rotating cavity. A lower valve stem is arranged in the fixing cavity. The lower valve stem is connected to the valve ball through the fixing cavity. The valve ball is limited on the lower valve stem and rotates around the lower valve stem.

[0012] Optionally, in some embodiments of the present application, a butting surface is provided on the valve body, and the butting surface is located at the opening of the rotating cavity;

[0013] The mounting bracket is assembled with the valve body through the butting surface. A first mounting hole is formed in the butting surface corresponding to the position of the mounting bracket, and a second mounting hole is formed in the mounting bracket corresponding to the position of the first mounting hole. The stud connects the first mounting hole and the second mounting hole, so that the mounting bracket is directly connected to the valve body through the stud.

[0014] Optionally, in some embodiments of the present application, a packing groove is formed in the rotating cavity. The packing groove is formed in the circumferential position of the rotating cavity. A packing gasket is arranged at the bottom of the packing groove, and a packing layer is arranged on the packing gasket. The packing layer is located in the packing groove.

[0015] Optionally, in some embodiments of the present application, a packing pressing member is arranged above the packing layer. The packing pressing member is connected to the valve body through a stud, and the packing pressing member presses the packing.

[0016] Optionally, in some embodiments of the present application, the packing pressing member includes a first pressing member and a second pressing member. The first pressing member is located on the second pressing member, and both the first pressing member and the second pressing member are sleeved on the main valve stem. The outer diameter of the second pressing member is equal to the inner diameter of the rotating cavity;

[0017] One end of the second pressing member abuts against the packing, and the other end of the second pressing member abuts against the first pressing member;

[0018] A limiting hole is formed in the first pressing member, and a limiting screw is arranged in the limiting hole. One end of the limiting screw is threadedly connected to the valve body. The first pressing member is sleeved on the limiting screw, and the first pressing member is slidably connected to the limiting screw. A limiting nut is arranged at the end of the limiting screw away from the valve body. The first pressing member is limited on the limiting screw through the limiting nut.

[0019] Optionally, in some embodiments of the present application, a shrapnel is disposed between the first pressing member and the limiting nut, and two ends of the shrapnel respectively abut against the first pressing member and the limiting nut.

[0020] Compared with the prior art, the beneficial effects in the present utility model are as follows:

[0021] In the embodiments of the present application, by canceling the middle flange structure and directly providing a packing groove on the valve body, the overall airtightness of the valve body can be greatly improved, the use efficiency can be increased. At the same time, canceling the middle flange structure enables the mounting bracket to be directly mounted on the valve body, which can reduce the overall volume of the fixed ball valve, reduce the corresponding weight and production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the fixed ball valve provided by the embodiment of the present application;

[0024] Figure 2 It is Figure 1 The enlarged schematic diagram of area A;

[0025] Figure 3 It is a schematic sectional view of the fixed ball valve provided by the embodiment of the present application;

[0026] Figure 4 It is Figure 3 The enlarged schematic diagram of area B;

[0027] Figure 5 It is a schematic sectional view of the fixed ball valve in the prior art.

[0028] DESCRIPTION OF THE REFERENCE NUMERALS:

[0029] 100, valve body; 110, communication cavity; 120, valve ball; 130, rotation cavity; 131, packing groove; 132, packing gasket; 133, packing layer; 140, fixed cavity; 150, abutting surface; 151, first mounting hole; 152, fixing hole; 200, mounting bracket; 210, stud; 220, second mounting hole; 300, main valve stem; 400, lower valve stem; 500, packing pressing member; 510, first pressing member; 511, limiting hole; 520, second pressing member; 530, limiting screw; 540, limiting nut; 550, shrapnel; 600, valve cover; 700, middle flange structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, in combination with the accompanying drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application. It can be understood that the accompanying drawings are only for reference and illustration, and are not used to limit the present application. The connection relationships shown in the drawings are only for clear description and do not limit the connection methods.

[0031] Specifically, as Figures 1 - 3 shown, in the embodiments of the present application, a fixed ball valve is provided. The fixed ball valve mainly includes a valve body 100 and a valve cover 600. Valve covers 600 are connected to both ends of the valve body 100, and a communication cavity 110 and a valve ball 120 are provided in the valve body 100. The communication cavity 110 communicates with the valve covers 600 at both ends, and the opening and closing of the valve body 100 are realized by the rotation of the valve ball 120.

[0032] Among them, in the prior art, the opening and closing of the valve ball 120 usually need to be completed by rotating the main valve stem 300, and a middle flange structure 700 is provided to cooperate with the installation of the main valve stem 300. In the embodiments of the present application, the setting of the middle flange structure 700 is cancelled, and the mounting bracket 200 is directly installed on the valve body 100 to reduce the corresponding installation space. Specifically:

[0033] As Figure 3 shown, a rotation cavity 130 is opened on the valve body 100. The rotation cavity 130 communicates with the communication cavity 110 in the valve body 100, and a main valve stem 300 is provided in the rotation cavity 130. The rotation of the main valve stem 300 drives the rotation of the valve ball 120. Among them, an abutting surface 150 is formed at one end of the rotation cavity 130 away from the communication cavity 110, and a mounting bracket 200 is connected to the abutting surface 150. The valve body 100 can be installed and fixed through the setting of the mounting bracket 200.

[0034] A first mounting hole 151 is opened on one side of the abutting surface 150 facing the mounting bracket 200, and a second mounting hole 220 is opened at a position corresponding to the first mounting hole 151 on the mounting bracket 200. When the mounting bracket 200 is installed on the valve body 100, the mounting bracket 200 is connected to the valve body 100 by passing a stud 210 through the first mounting hole 151 and the second mounting hole 220, so that the mounting bracket 200 can be directly fixed on the valve body 100, and the overall volume of the ball valve is prevented from increasing due to the influence of the volume of the middle flange structure 700.

[0035] Among them, in the rotating cavity 130, a packing groove 131 is further provided. The packing groove 131 is annularly arranged around the rotating cavity 130, and a packing gasket 132 and a packing layer 133 are arranged in the packing groove 131. The packing gasket 132 is located at the bottommost position of the packing groove 131, and the packing layer 133 is arranged above the packing gasket 132. By the packing gasket 132 and the packing layer 133 being located in the rotating cavity 130, when the main valve stem 300 rotates, the packing layer 133 can play a good sealing role.

[0036] Among them, in the prior art, as Figure 5 shown, a protruding part is further provided on the intermediate flange structure 700. The protruding part is located in the rotating cavity 130, and a packing groove 131 is provided on the protruding part of the intermediate flange structure 700. More space is required for the setting in terms of structure. At the same time, since a part of the intermediate flange structure 700 is located inside the valve body 100, the gap between the components on the valve body 100 is increased, affecting its sealing performance.

[0037] By comparing with the content of the prior art above, directly arranging the packing layer 133 on the valve body 100 in the embodiment of the present application can greatly increase the overall airtightness of the valve body 100 and correspondingly reduce the corresponding volume.

[0038] Among them, a packing presser 500 is further provided above the packing layer 133. As shown in the figure, the packing presser 500 includes a first presser 510 and a second presser 520. The first presser 510 is located on the second presser 520, and the first presser 510 abuts against the second presser 520. Both the first presser 510 and the second presser 520 are sleeved outside the main valve stem 300.

[0039] On the basis of the above structure, a part of the second presser 520 is located in the rotating cavity 130. More specifically, a part of the second presser 520 is located in the packing groove 131, so that one end of the second presser 520 facing the packing groove 131 abuts against the packing layer 133. Among them, the outer diameter of the second presser 520 is equal to the inner diameter of the rotating cavity 130.

[0040] The first presser 510 is located above the second presser 520 and abuts against the second presser 520. To achieve this abutting effect, a plurality of limiting holes 511 are annularly arranged on the first presser 510, and limiting screws 530 are arranged in the plurality of limiting holes 511. Fixing holes 152 are opened at positions corresponding to the limiting holes 511 on the abutting surface 150 of the valve body 100. One end of the limiting screw 530 is threadedly connected to the fixing hole 152, and a limiting nut 540 is arranged at the end of the limiting screw 530 away from the fixing hole 152, so that the first presser 510 is limited between the limiting nut 540 and the valve body 100, and further the first presser 510 squeezes the second presser 520.

[0041] A shrapnel 550 is arranged between the limit nut 540 and the first pressing part 510. The shrapnel 550 is sleeved on the limit screw 530 to buffer the first pressing part 510.

[0042] A fixed cavity 140 is further arranged on the valve body 100. The fixed cavity 140 is arranged on the valve body 100 relative to the position of the main valve stem 300. A lower valve stem 400 is arranged in the fixed cavity 140. The lower valve stem 400 is located in the fixed cavity 140 and the lower valve stem 400 abuts against the valve ball 120, so that the valve ball 120 rotates through the lower valve stem 400 to complete the opening and closing process of the fixed ball valve.

[0043] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A fixed ball valve, characterized in that, Comprising: A valve body, a communication cavity is provided in the valve body, a valve ball is arranged in the communication cavity, and the valve ball rotates in the communication cavity to open and close the valve body; A rotation cavity is arranged on the valve body, the rotation cavity communicates with the communication cavity, a main valve rod is arranged in the rotation cavity, the main valve rod is connected to the valve ball through the rotation cavity, so that the main valve rod drives the valve ball to rotate in the communication cavity, a packing groove is arranged in the rotation cavity, the packing groove is arranged at the circumferential position of the rotation cavity, a packing gasket is arranged at the bottom position of the packing groove, and a packing layer is arranged on the packing gasket, and the packing layer is located in the packing groove; Wherein, an installation bracket is arranged on the valve body, the installation bracket is installed on the valve body through a stud, and the installation bracket is installed corresponding to the position of the rotation cavity; A fixed cavity is arranged on the valve body at a position opposite to the rotation cavity, a lower valve rod is arranged in the fixed cavity, the lower valve rod is connected to the valve ball through the fixed cavity, and the valve ball is limited on the lower valve rod and rotates around the lower valve rod.

2. The fixed ball valve according to claim 1, characterized in that, A butting surface is arranged on the valve body, and the butting surface is located at the opening of the rotation cavity; The installation bracket is assembled with the valve body through the butting surface, a first installation hole is arranged on the butting surface corresponding to the position of the installation bracket, a second installation hole is arranged on the installation bracket corresponding to the position of the first installation hole, and the stud connects the first installation hole and the second installation hole, so that the installation bracket is directly connected to the valve body through the stud.

3. A fixed ball valve according to claim 1, characterized in that, A packing pressing member is arranged above the packing layer, the packing pressing member is connected to the valve body through a limit screw, and the packing pressing member presses the packing.

4. The fixed ball valve according to claim 3, characterized in that, The packing pressing member includes a first pressing member and a second pressing member, the first pressing member is located on the second pressing member, and both the first pressing member and the second pressing member are sleeved with the main valve rod, and the outer diameter of the second pressing member is equal to the inner diameter of the rotation cavity; One end of the second pressing member abuts against the packing, and the other end of the second pressing member abuts against the first pressing member; A limit hole is arranged on the first pressing member, the limit screw is arranged in the limit hole, one end of the limit screw is threadedly connected to the valve body, the first pressing member is sleeved on the limit screw, and the first pressing member is slidably connected to the limit screw, and a limit nut is arranged at the end of the limit screw away from the valve body, and the first pressing member is limited on the limit screw through the limit nut.

5. A fixed ball valve according to claim 4, characterized in that, A spring piece is arranged between the first pressing member and the limit nut, and both ends of the spring piece respectively abut against the first pressing member and the limit nut.

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