CN111853272A

CN111853272A - Valve with a valve body

Info

Publication number: CN111853272A
Application number: CN201910344660.4A
Authority: CN
Inventors: 张文杰; 肖天龙
Original assignee: York Guangzhou Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Current assignee: York Guangzhou Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-10-30

Abstract

A valve is provided that includes a valve body having a fluid passage for passage of fluid and a valve stem pocket, a valve stem, a switch passage and a drainage passage; the valve stem is at least partially disposed in the valve stem receptacle to control opening and closing of the fluid passageway by movement of the valve stem; the switching passage is disposed within the valve stem, and the drainage passage is capable of communicating the fluid passage and the switching passage. The valve provided by the application is convenient to manufacture and low in cost.

Description

Valve with a valve body

Technical Field

The present invention relates to a valve, and more particularly, to a valve capable of connecting an external device.

Background

The valve starts the function of opening and closing the flow path in the pipeline. In order to meet the requirement of after-sales maintenance, a needle valve needs to be arranged on a valve body. The needle valve can be connected to external equipment (e.g., a meter) for after-market maintenance or to a vacuum pump for internal pressure relief. The needle valve is usually arranged in parallel with the valve rod, but the arrangement mode causes the valve body to have large volume, more processing steps and high cost.

Disclosure of Invention

To solve the above problems, the present application provides a valve comprising:

a valve body including a fluid passage configured to pass fluid and a stem cavity;

A valve stem disposed at least partially within the valve stem cavity to control opening and closing of the fluid passageway by movement of the valve stem;

a switch passage disposed within the valve stem;

a drainage channel capable of communicating the fluid channel and the switch channel.

Further, the valve rod can control the opening and closing of the fluid passage through rotation, and the rotation of the valve rod can control the communication and disconnection of the fluid with the outside.

Further, the valve further comprises:

a valve ball disposed in the fluid passage, the valve ball being drivable by the valve stem to rotate in the fluid passage, the valve ball including a valve ball outer wall and a through hole through which the valve ball can open the fluid passage or through which the valve ball outer wall can close the fluid passage;

the drainage channel comprises a valve ball drainage channel and a valve rod drainage channel, the valve ball drainage channel is arranged in the valve ball and is positioned at the top of the valve ball, the valve rod drainage channel is arranged in the valve rod and is positioned at the bottom of the valve rod, and the valve rod drainage channel is configured to communicate the through hole with the switch channel;

The drainage channel is in communication with fluid when the valve ball opens the fluid channel through the through hole; the drainage channel is disconnected from the fluid when the valve ball closes the fluid channel by the valve ball outer wall.

Further, the drainage channel comprises a valve body drainage channel and a valve rod drainage channel, the valve body drainage channel is arranged in the valve body, the valve rod drainage channel is arranged in the valve rod, and the valve rod can control the connection and disconnection between the valve rod drainage channel and the valve body drainage channel, so that the connection and disconnection between fluid and the outside are controlled.

Further, the valve stem is movable up and down with respect to the valve body to open and close the fluid passage through a lower end of the valve stem.

Further, the drainage channel is disposed in the valve stem, the drainage channel configured to communicate the switch channel with the fluid channel.

Further, drainage channel includes valve body drainage channel and valve rod drainage channel, valve body drainage channel sets up in the valve body, valve rod drainage channel sets up in the valve rod, the valve rod can be through rotation control valve rod drainage channel with intercommunication and disconnection between the valve body drainage channel to control fluid and external intercommunication and disconnection.

Further, the valve is an angle valve or a gate valve.

Further, the valve further comprises:

a switching device disposed in the switching passage and configured to open and close the switching passage so that fluid can be communicated with and disconnected from the outside through the switching device.

Further, the bottom diameter of the switch channel is larger than the top diameter of the valve rod drainage channel, so that a step is formed at the joint of the switch channel and the valve rod drainage channel, and the switch device enables fluid to be communicated with the outside and disconnected from the outside by abutting against and keeping away from the step.

Further, the switch device is a needle valve.

In some embodiments of the present application, a switch passage communicating with the outside is provided in the valve stem, and the switch passage is controlled to communicate with and be disconnected from the outside by a needle valve. The needle valve base for installing the needle valve does not need to be arranged on the valve body, so that the valve can be small and compact. And usually the valve body adopts the copper material to make, difficult processing, and the valve rod is made of stainless steel material commonly used, easy processing can also practice thrift the copper material that is used for making the needle valve base simultaneously. In other embodiments of the present application, a switching passage communicating with the outside is provided in the valve stem, and the needle valve is not provided in the switching passage. By rotating the valve rod, not only can the opening and closing of the valve be controlled, but also the opening and closing of the switch channel can be controlled. In these embodiments, the valve is simpler in construction.

Drawings

FIG. 1A is a perspective view of a first embodiment of the valve of the present application;

FIG. 1B is an exploded view of a first embodiment of the valve of the present application;

FIG. 2A is an axial cross-sectional view of a first embodiment of the valve of the present application;

FIG. 2B is a partial enlarged view of FIG. 2A;

FIG. 3A is a cross-sectional view of the valve stem of FIG. 2A with the needle valve in the open position;

FIG. 3B is a cross-sectional view of the valve stem of FIG. 2A with the needle closed;

FIG. 4 is an axial cross-sectional view of a second embodiment of the valve of the present application;

FIG. 5 is an axial cross-sectional view of a third embodiment of the valve of the present application;

FIG. 6A is a sectional view of the valve of FIG. 5 with the needle valve open;

FIG. 6B is a cross-sectional view of the valve of FIG. 5 with the needle closed;

FIG. 7 is an axial cross-sectional view of a fourth embodiment of the valve of the present application;

FIG. 8 is an axial cross-sectional view of a fifth embodiment of the valve of the present application;

FIG. 9A is a perspective view of a sixth embodiment of the valve of the present application;

FIG. 9B is an exploded view of a sixth embodiment of the valve of the present application;

FIG. 10 is an axial cross-sectional view of a sixth embodiment of the valve of the present application;

FIG. 11 is an axial cross-sectional view of a seventh embodiment of the valve of the present application;

FIG. 12A is a perspective view of an eighth embodiment of the valve of the present application;

FIG. 12B is an exploded view of an eighth embodiment of the valve of the present application;

FIG. 13 is an axial cross-sectional view of an eighth embodiment of the valve of the present application;

FIG. 14 is an axial cross-sectional view of a ninth embodiment of the valve of the present application.

Detailed Description

Various embodiments of the present application will now be described with reference to the accompanying drawings, which form a part hereof. It should be understood that although directional terms such as "front," "rear," "upper," "lower," "left," "right," and the like may be used herein to describe various example structural portions and elements of the application, these terms are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the embodiments disclosed herein can be arranged in a variety of orientations, these directional terms are used for purposes of illustration only and are not to be construed as limiting.

FIG. 1A is a perspective view and FIG. 1B is an exploded view of a first embodiment of the valve of the present application, showing the structure of the valve 100. As shown in fig. 1A and 1B, the valve 100 is a ball valve. The valve 100 includes a valve body 105, a valve ball 120, a valve stem 108, and a needle valve 110. The valve body 105 has a fluid passage 150, and a fluid can flow through the fluid passage 150. The valve body 105 is disposed such that a pipe (not shown) connected to both ends of the valve body 105 forms an angle of 180 degrees therebetween. The valve ball 120 and the valve rod 108 are installed in the valve body 105, and the valve rod 108 can rotate to drive the valve ball 120 to rotate, so that the on-off of the fluid in the valve body 105 is controlled. The valve body 105 includes a first valve body 102 and a second valve body 103 so that the valve ball 120 and the valve stem 108 can be fitted into the valve body 105. The top of the valve ball 120 has a groove 129 and the bottom of the valve stem 108 has a protrusion 139. The protrusion 139 can be inserted into the groove 129, so that the valve ball 120 can be rotated together with the valve rod 108 being rotated about the axial direction of the valve rod 108. The valve ball 120 has a through bore 123 and a ball outer wall 126, and when the valve ball 120 is rotated in the valve body 105 such that the through bore 123 is aligned with the fluid passage 150, fluid can flow through the through bore 123 and the valve 100 is opened; when the ball 120 is rotated in the valve body 105 such that the ball outer wall 126 is aligned with the fluid passage 150, fluid is blocked by the ball outer wall 126 from flowing past the ball 120 and the valve 100 is closed. Wherein, the valve ball 120 is driven to rotate by rotating the valve rod 108, so as to adjust the flow. The flow rate of the valve 100 changes from maximum to closed (closed is the minimum flow rate) as the ball 120 rotates such that the axis of the through-hole 123 rotates from parallel to perpendicular relative to the axis of the fluid passage 150. A needle valve 110 is mounted in the valve stem 108, the needle valve 110 being adapted to controllably communicate fluid in the valve body 105 with the outside, such as with a meter or vacuum, to sense a parameter of the fluid in the valve body 105, or to release pressure in the line. This part will be described in detail below.

Fig. 2A is an axial cross-sectional view of a first embodiment of the valve of the present application, and fig. 2B is a partial enlarged view of a dashed box portion of fig. 2A, showing the internal structure of the valve 100. As shown in fig. 2A and 2B, the valve body 105 has a fluid passage 150 for circulating a fluid. The top of the valve body 105 includes a stem mounting portion 207, the inner wall of the stem mounting portion 207 defining a stem receiving cavity 220 for mounting the stem 108. The valve body 105 has a ball mounting portion 208 therein, the ball mounting portion 208 being for mounting the ball 120, the ball mounting portion 208 being located below the stem mounting portion 207 such that the ball 120 is located below the stem 108. The valve stem 108 has an open/close passage 203 therein for mounting the needle valve 110. The needle valve 110 can be opened and closed so that the fluid in the open-close passage 203 can be communicated with and disconnected from the outside. The valve 100 also has a drain passage 240, and the drain passage 240 has one end communicating with the fluid passage 150 and the other end communicating with the open/close passage 203 so that the fluid in the fluid passage 150 can enter the open/close passage 203, thereby enabling the fluid in the valve body 105 to be communicated with and disconnected from the outside through the needle 110. In this embodiment, the flow passage 240 includes a valve body flow passage 231 and a valve stem flow passage 238. Valve body flow directing passage 231 has a valve body flow directing passage inlet 235 and a valve body flow directing passage outlet 236, wherein valve body flow directing passage inlet 235 is located on an inner wall of flow directing passage 240 and valve body flow directing passage outlet 236 is located on an inner wall of valve stem mounting portion 207, i.e., valve body flow directing passage 231 is in communication with valve stem receiving cavity 220. Valve stem drain passage 238 has a valve stem drain passage inlet 212 and a valve stem drain passage outlet 213, wherein valve stem drain passage inlet 212 is located on the outer wall of the side of valve stem 108, valve stem drain passage outlet 213 is located on the wall of switch passage 203, and valve stem drain passage inlet 212 communicates with valve body drain passage outlet 236 so that switch passage 203 can communicate with fluid in fluid passage 150. At the position of the stem drain channel inlet 212, the sidewall of the stem 108 is recessed inwardly to form a groove 142 (see fig. 1B) that surrounds the stem around its circumference, i.e., the stem drain channel inlet 212 is formed at the bottom of the groove 142. Wherein the width of the groove 142 is no greater than the width of the valve body diversion passage outlet 236. As fluid flows from valve body drain 231, into groove 142, and into valve stem drain 238, fluid may flow into valve stem drain 238 through groove 142 during rotation of valve stem 108 even if valve stem drain inlet 212 is not aligned with valve body drain outlet 236.

When the needle 110 is opened, the fluid in the valve body 105 enters the opening and closing passage 203 from the drain passage 240 and communicates with the outside through the needle 110 located in the opening and closing passage 203; when the needle 110 is closed, the fluid in the open-close passage 203 is disconnected from the outside, so that the fluid in the valve body 105 cannot communicate with the outside. Therefore, when it is necessary to know the fluid parameter in the valve body 105 or to change the internal pressure in the valve body 105, the needle valve 110 is opened so that the fluid in the valve body 105 communicates with the corresponding equipment from the outside. When it is not necessary to connect an external device, the needle valve 110 is closed so that the fluid in the valve body 105 does not leak to the outside. The valve 100 of the present application may be used to connect a pressure device or a container, for example, for connecting a device in a refrigerant cycle system of an air conditioner. Depending on the requirements of the use environment, it is necessary to be able to detect the pressure parameter in the upstream pressure device or vessel to which the valve 100 is connected, regardless of whether the valve 100 is in the open or closed state, or to detect the pressure parameter in the upstream pressure device or vessel to which the valve 100 is connected only when the valve 100 is open. To meet the above requirements, when the valve 100 of fig. 2A is installed, the left end of the valve 100 may be connected to an upstream pressure device or a vessel, or the right end of the valve 100 may be connected to an upstream pressure device or a vessel. When the left end of the valve 100 is connected to an upstream pressure device or container, since the valve body diversion channel inlet 235 is located upstream of the valve ball 120, no matter what position the valve ball 120 is rotated to, the switch channel 203 can always communicate with the fluid in the pressure device through the diversion channel 240, that is, when the left end of the valve 100 is connected to the pressure container, no matter whether the valve 100 is opened or closed, an external detection device connected to the needle valve 110 can detect the pressure parameter of the upstream pressure device or container to which the valve 100 is connected, that is, the detection of the pressure parameter is not affected by the opening or closing of the valve 100; this connection is suitable for situations where knowledge of the pressure parameters of the pressure device or vessel upstream of the valve 100 is required regardless of whether the valve is open or closed. Since the valve body drain passage inlet 235 is located downstream of the valve ball 120 when the right end of the valve 100 is connected to an upstream pressure device or vessel, if the valve ball 120 is rotated so that the valve 100 is closed, the drain passage 240 is simultaneously disconnected from the upstream pressure device or vessel to which the valve 100 is connected, that is, when the right end of the valve 100 is connected to a pressure vessel, while the valve 100 is closed, an external sensing device connected to the needle valve 110 cannot sense a pressure parameter of the upstream pressure device or vessel to which the valve 100 is connected; this connection can avoid damage to the sensing device due to the large upstream pressure of the valve 100 when the valve 100 is closed, and is suitable for situations where it is not necessary to sense the pressure parameters of the pressure device or vessel upstream of the valve 100 when the valve 100 is closed; this connection is also useful when a user replaces or overhauls the external test equipment, and particularly, when the user needs to replace or overhaul the external test equipment, the valve 100 may be used to cut off the fluid connection of the external test equipment to the upstream pressure device or vessel and then replace or overhaul the external test equipment without worrying about the fluid leakage in the upstream pressure device or vessel.

The operation of one of the needle valves will now be described with reference to figures 3A and 3B.

Fig. 3A is a sectional view in a state where the needle valve 110 in the valve stem 108 in fig. 2A is opened, and fig. 3B is a sectional view in a state where the needle valve 110 in the valve stem 108 in fig. 2A is closed. As shown in fig. 3A, the needle 110 includes a housing 302, a pressing rod 301, and a spring 303, wherein the pressing rod 301 is sleeved in the housing 302 with a gap from the housing 302, thereby forming a needle passage 330, and a fluid can flow through the needle passage 330. At the lower part of the needle valve 110, a gap between the housing 302 and the presser bar 301 forms a needle valve passage inlet 311, and at the upper part of the needle valve 110, a gap between the housing 302 and the presser bar 301 forms a needle valve passage outlet 312. The upper portion of the housing 302 is in sealing connection with the valve stem 108 such that fluid cannot escape from the gap between the valve stem 108 and the housing 302. The needle 110 is located in the open/close passage 203 so that the fluid in the open/close passage 203 can enter the needle passage 330 from the needle passage inlet 311 and communicate with the outside through the needle passage outlet 312. The lower portion of the plunger 301 has a sealing device 305, the sealing device 305 being sized to cover the needle valve passage inlet 311. The plunger 301 has an outwardly projecting boss 321 on the outside and a step 322 on the inside of the housing 302, the two ends of the spring 303 abut against the boss 321 and the step 322, and the reaction force generated when the spring 303 is compressed causes the boss 321 to tend to move away from the step 322, i.e. the plunger 301 tends to move upwards relative to the housing 302 in the orientation shown in fig. 3A. As shown in fig. 3A, when the needle 110 is in the open state, an external force presses the pressing rod 301 downward against the elastic force of the spring 303, so that the sealing device 305 is moved downward away from the housing 302, the needle passage inlet 311 is opened, and fluid can enter the needle passage 330. When the needle 110 is in the closed state, as shown in fig. 3B, the external force applied to the pressing rod 301 is removed, and the spring 303 drives the pressing rod 301 to move upward until the sealing device 305 abuts against the lower end of the housing 302. At this point the seal 305 seals the needle passage inlet 311 and fluid cannot enter the needle passage 330, so that the needle 110 is closed.

In the embodiment shown in fig. 1A-3B, the valve 100 is adapted to communicate and disconnect fluid in the valve body 105 from the outside by opening and closing a needle valve mounted on a valve stem 108. In the above embodiment, the needle 110 is provided on the valve stem 108, and the valve 100 can be made smaller and more compact, can be easily manufactured, and can save materials, as compared with the case where the needle 110 is provided on the valve body 105. In particular, the valve body 105 is usually made of copper material, the valve rod 108 is usually made of stainless steel or the like, the needle valve 110 arranged on the valve rod 108 is difficult to machine, and the valve body is made of less copper material and has lower cost.

FIG. 4 is a second embodiment of the valve of the present application, showing another valve 400. Valve 400 is similar to valve 100 shown in FIG. 2A, except that instead of providing a valve body drain passage, drain passage 440 includes a valve stem drain passage 438 and a valve ball drain passage 431. Wherein the valve stem drain passage 438 is located at the bottom of the valve stem 408 and the valve ball drain passage 431 is located at the top of the valve ball 420 and extends through the top of the valve ball 420. So that fluid can enter the switching passage 403 from the through hole 423 of the valve ball 420. That is, the valve 400 differs from the valve 100 in that the bleed passage 440 directs fluid from the valve ball 420 into the on-off passage 403 rather than from the valve body into the on-off passage 403, such that when the valve 400 is closed, the bleed passage 440 is disconnected from fluid upstream of the valve 400. The embodiment shown in fig. 4 can achieve a similar effect when the right end of the valve 100 shown in fig. 2A is connected to the upstream of the fluid, and when the valve 400 is closed, the outside world detection device cannot detect the pressure parameter of the fluid upstream of the valve 400.

Fig. 5 is a third embodiment of the valve of the present application, showing another valve 500. Similar to the valve 400 shown in FIG. 4, except that the valve 500 employs another needle valve 510. And to accommodate the use of the needle valve 510, the top diameter of the valve stem drain passage 438 is set smaller than the bottom diameter of the switch passage 403, thereby forming a step 555 at the junction of the switch passage 403 and the valve stem drain passage 438. The step 555 is used to mate with the needle valve 510. Wherein step 555 department is equipped with the chamfer, can increase the area of contact with needle valve 510 for leakproofness when needle valve 510 closes is better. The operation of the needle valve 510 will be described with reference to fig. 6A and 6B.

Fig. 6A is a sectional view of the valve rod 408 of fig. 5 in an open state of the needle valve 110, and fig. 6B is a sectional view of the valve rod 408 of fig. 5 in a closed state of the needle valve 510. As shown in FIG. 6A, the needle valve 510 includes a body 602, and the body 602 is installed in the open/close passage 403. The body 602 includes a needle passage 630 in which fluid can flow in the needle passage 330. The needle passage 630 includes a first passage 641 and a second passage 642, wherein the first passage 641 is disposed in the axial direction of the main body 602, and the second passage 642 is disposed in the radial direction of the main body 602. The needle passage 630 has a needle passage inlet 611 and a needle passage outlet 612, the needle passage inlet 611 being located at a side of the body 602 and having a distance from the wall of the open-close passage 403, and the needle passage outlet 612 being located at the top of the body 602, so that fluid can communicate with the outside through the needle passage inlet 611, the second passage 642, the first passage 641, and the needle passage outlet 612 in this order. The body 602 also has a sealing portion 605 with a decreasing outer diameter from top to bottom, the sealing portion 605 being located below the needle passage inlet 611. The sealing device 305 can abut against the step 555 to disconnect the valve stem drainage channel 438 from the switch channel 403. In the open state of the needle valve 510 as shown in FIG. 6A, the body 602 is in a remote position relative to the valve stem 408 and the seal 605 is spaced from the step 555 so that fluid can flow from the valve stem drain passage 438 into the switch passage 403, the needle passage 630 and, in turn, into communication with the environment. As shown in FIG. 6B, when the needle valve 510 is in the closed position, moving the body 602 downward relative to the valve stem 408 until the seal 605 abuts the step 555, sealing off the valve stem drain passage 438, fluid cannot enter the needle passage 630 and the needle valve 510 is closed. The embodiments shown in fig. 5-6B achieve the same effect as the embodiment shown in fig. 4, in that the outside world detection device cannot detect the pressure parameter of the fluid upstream of the valve 500 when the valve 500 is closed.

FIG. 7 is a fourth embodiment of the valve of the present application, showing another valve 700. Similar to the valve 100 shown in fig. 2A, the difference is that the valve 700 does not need to be provided with the needle 110, and the fluid in the valve body can be switched on and off with the outside only by rotating the valve rod 708. As shown in FIG. 7, flow path 740 includes valve body flow path 731 and valve stem flow path 738, valve stem flow path 738 having valve stem flow path inlet 712 and valve stem flow path outlet 713, and valve body flow path 731 having valve body flow path inlet 735 and valve body flow path outlet 736. Wherein the valve stem drainage channel inlet 712 is located on the outer wall of the side of the valve stem 708, unlike the embodiment shown in fig. 2A, a circumference of the valve stem 708 at the valve stem drainage channel inlet 712 is no longer provided with a groove recessed into the interior of the valve stem 708, such that near the valve stem drainage channel inlet 712, the outer wall of the valve stem 708 can be tightly attached to the wall of the valve stem cavity 720. That is, the drain passage 740 communicates only when the valve stem 708 is rotated to the point where the valve body drain passage outlet 736 is aligned with the valve stem drain passage inlet 712; when the valve stem 708 is rotated such that the valve body drain passage outlet 736 is misaligned with the valve stem drain passage inlet 712, the drain passage 740 is broken. A seal 761 may also be provided adjacent the valve stem drain channel inlet 712 for enhancing the seal at the valve stem drain channel inlet 712. In this embodiment, turning the valve stem 708 can control the opening and closing of the fluid passage 740, thereby controlling the connection and disconnection of the fluid in the valve body 705 to the outside, without the need for a needle valve. The embodiment shown in fig. 7 can achieve similar effects as the embodiment shown in fig. 2A.

Fig. 8 is a fifth embodiment of the valve of the present application, showing another valve 800. Similar to the valve 400 of FIG. 4, except that the needle valve 110 is not required to operate as compared to the embodiment of FIG. 4. As with the embodiment shown in FIG. 4, valve stem drain passage 438 is located at the bottom of valve stem 408 and ball drain passage 431 is located at the top of valve ball 420 and extends through the top of valve ball 420. So that fluid can enter the switching passage 403 from the through hole 423 of the valve ball 420. When the valve stem 408 is rotated such that the outer ball wall of the ball 420 is aligned with the fluid passage 450, the valve 800 is closed, and at the same time, the fluid is also disconnected from the switch passage 403. That is, when the valve 800 is opened, the fluid can communicate with the outside through the opening and closing passage 803, and when the valve 800 is closed, the fluid cannot communicate with the outside. The valve 800 of the embodiment shown in fig. 8 has a narrower application range than the valve 400 of fig. 4, when the valve 800 is opened by the ball 420, the fluid in the fluid channel 450 is communicated with the outside to cause leakage, so the valve 800 must be used with an external testing device or a plug to avoid leakage, and obviously, the operation of detaching the external testing device can be performed only when the valve 800 is closed.

Fig. 9A is a perspective view and fig. 9B is an exploded view of a sixth embodiment of the valve of the present application, illustrating the structure of the valve 900. As shown in fig. 9A and 9B, the valve 900 is an angle valve, and the valve 900 includes a valve body 905, a stem 908, and a needle valve 910. A stem 908 is mounted in the valve body 905, and the stem 908 can be rotated to control the opening and closing of fluid in the valve body 905. The valve body 905 has a fluid passage 950, and the fluid passage 950 is configured to communicate fluid. The valve body 905 includes a first valve body 902, a second valve body 903, and a third valve body 904, wherein the first valve body 902 and the second valve body 903 are respectively connected to the third valve body 904, and the first valve body 902 is perpendicular to the second valve body 903 such that an angle of 90 degrees is formed between pipes connected to both ends of the valve body 905, and thus a flow direction of fluid in the pipe connected to the valve body 105 is at an angle of 90 degrees. A valve stem 908 is mounted in the third valve body 904. A needle valve 910 is mounted in the valve stem 908, the needle valve 910 being adapted to controllably communicate fluid in the valve body 905 with the outside, for example, with a meter or vacuum, to sense a parameter of the fluid in the valve body 905 or to release pressure in the line. This part will be described in detail below.

Fig. 10 is an axial cross-sectional view of a sixth embodiment of the valve of the present application, showing the internal structure of the valve 900. As shown in fig. 10, the valve body 905 has a fluid passage 950 for circulating a fluid. The stem 908 is installed in the valve body 905, and the stem 908 can move up and down in the valve body 905 while the stem 908 rotates relative to the valve body 905 by screw-fitting with the valve body 905. The lower end of the stem 908 has a sealing portion 1071, and the upper portion of the second valve body 903 has an opening 1070, and the sealing portion 1071 can close and open the opening 1070 when the stem 908 moves up and down in the valve body 905, thereby closing and opening the valve 900. The valve stem 908 has an open/close passage 1003 therein for mounting a needle valve 910. The needle valve 910 can be opened and closed so that the fluid in the open-close passage 1003 can be communicated with and disconnected from the outside. The valve 900 further has a drainage channel 1040, one end of the drainage channel 1040 communicates with the fluid channel 950, and the other end communicates with the switch channel 1003, so that the fluid in the fluid channel 950 can communicate with the outside through the drainage channel 1040, the switch channel 1003, and the needle valve 910 in sequence. In this embodiment, the drainage channel 1040 is located on the side of the valve stem 908, the drainage channel 1040 having a drainage channel inlet 1012 and a drainage channel outlet 1013. Wherein the drainage channel inlet 1012 is located on the outer wall of the side of the stem 908 and the drainage channel outlet 1013 is located on the inner wall of the on-off channel 1003, so that the on-off channel 1003 can communicate with the fluid in the fluid channel 950 through the drainage channel 1040.

When the needle valve 910 is opened, the fluid in the valve body 905 enters the opening and closing passage 1003 from the drainage passage 1040 and is communicated with the outside through the needle valve 910 positioned in the opening and closing passage 1003; when the needle valve 910 is closed, the fluid in the open/close passage 1003 is disconnected from the outside, so that the fluid in the valve body 905 cannot communicate with the outside. Therefore, when it is necessary to know the fluid parameter in the valve body 905 or to change the internal pressure in the valve body 905, the needle valve 910 is opened so that the fluid in the valve body 905 communicates with the corresponding device outside. When it is not necessary to connect an external device, the needle valve 910 is closed so that the fluid in the valve body 905 does not leak to the outside. The needle valve used in the present embodiment may be a needle valve as shown in fig. 3A-3B or fig. 6A-6B. The valve 900 also achieves a technical effect similar to the valve 100 of fig. 2A, when an upstream pressure device or container is connected to the first valve body 902, regardless of whether the valve 900 is in an open or closed state, the pressure parameter of the fluid in the valve body 905 can be detected by opening a detection device outside the needle valve 910; when an upstream pressure device or container is connected to the second valve body 903, the external sensing device cannot sense the pressure parameter of the fluid in the valve body 905 as long as the valve 900 is in the closed state.

In fig. 10, the bleed passage inlet 1012 of the bleed passage 1040 is opened at a position close to the first valve body 902, but it is obvious to those skilled in the art that the bleed passage inlet 1012 may be opened at an end surface of the seal portion 1071, i.e., at a position close to the second valve body 903, to achieve a similar function. In this configuration, when an upstream pressure device or vessel is connected to the second valve body 903, the pressure parameter of the fluid inside the valve body 905 can be detected by opening a detection device outside the needle valve 910, regardless of whether the valve 900 is in the open or closed state; when an upstream pressure device or vessel is connected to the first valve body 902, the external sensing device cannot sense the pressure parameter of the fluid in the valve body 905 as long as the valve 900 is in the closed state. .

FIG. 11 is an axial cross-sectional view of a seventh embodiment of the valve of the present application, showing another valve 1100. Similar to the valve 900 shown in fig. 10, the difference is that the valve 1100 does not need to be provided with the needle valve 910, and the fluid in the valve body can be switched on and off with the outside only by rotating the valve rod 1108. As shown in FIG. 11, flow channel 1140 includes a valve body flow channel 1131 and a valve stem flow channel 1138, valve stem flow channel 1138 having a valve stem flow channel inlet 1112 and a valve stem flow channel outlet 1113, and valve body flow channel 1131 having a valve body flow channel inlet 1135 and a valve body flow channel outlet 1136. Wherein the valve stem drainage channel inlet 1112 is located on the outer wall of the side of the valve stem 1108, and the outer wall of the valve stem 1108 can be closely attached to the wall of the valve stem receiving cavity 1120 near the valve stem drainage channel inlet 1112. That is, the drain channel 1140 is only in communication when the valve stem 1108 is rotated such that the valve body drain channel outlet 1136 is aligned with the valve stem drain channel inlet 1112; when the valve stem 1108 is rotated such that the valve body flow channel outlet 1136 is misaligned with the valve stem flow channel inlet 1112, the flow channel 1140 is broken. A sealing ring 1161 may also be provided adjacent the valve stem drain channel inlet 1112 for enhancing the sealing of the valve stem drain channel inlet 1112. In this embodiment, the valve rod 1108 is rotated to push and control the passage of the drainage channel 1140, so that the fluid in the valve body 1105 can be connected or disconnected with the outside without providing a needle valve. The valve 1100 of fig. 11 achieves a similar effect as the valve 900 of fig. 10.

Fig. 12A is a perspective view and fig. 12B is an exploded view of an eighth embodiment of the valve of the present application, showing the structure of the valve 1200. As shown in fig. 12A and 12B, the valve 1200 is a gate valve, and the valve 1200 includes a valve body 1205, a valve stem 1208, and a needle valve 1210. The valve body 1205 has a fluid passage 1250 with fluid communication through the fluid passage 1250. A valve stem 1208 is mounted in the valve body 1205, the valve stem 1208 being rotatable to control the on and off of fluid in the valve body 1205. The valve body 1205 comprises a first valve body 1202 and a second valve body 1203, the first valve body 1202 is connected with the upper part of the second valve body 1203, two ends of the second valve body 1203 are respectively connected with pipelines, and the second valve body 1203 is arranged to enable the pipelines respectively connected with two ends of the valve 1200 to be parallel, namely, the included angle is 180 degrees. A needle valve 1210 is mounted in the valve stem 1208, the needle valve 1210 being adapted to controllably communicate fluid in the valve body 1205 with the outside world, such as with a meter or vacuum, to sense a parameter of the fluid in the valve body 1205, or to relieve pressure in a line. This part will be described in detail below.

Fig. 13 is an axial cross-sectional view of an eighth embodiment of the valve of the present application, showing the internal structure of the valve 1200. As shown in fig. 13, the valve body 1205 has a fluid passage 1250 for communicating fluid. The valve stem 1208 is mounted in the valve body 1205, and the valve stem 1208 can move up and down in the valve body 1205 through a threaded engagement with the valve body 1205 while the valve stem 1208 rotates relative to the valve body 1205. The lower end of the valve stem 1208 has a seal 1371 and the valve body 1205 has an opening 1370 therein, the seal 1371 being able to close and open the opening 1370 as the valve stem 1208 moves up and down in the valve body 1205, thereby closing and opening the valve 1200. The valve stem 1208 has an on-off passage 1303 therein for mounting the needle valve 1210. The needle valve 1210 can be opened and closed so that the fluid in the open-close passage 1303 can be connected to and disconnected from the outside. The valve 1200 further has a flow guide channel 1340, and one end of the flow guide channel 1340 is communicated with the fluid channel 1250, and the other end is communicated with the switch channel 1303, so that the fluid in the fluid channel 1250 can sequentially enter the flow guide channel 1340, the switch channel 1303, the needle valve 1210 and be communicated with and disconnected from the outside through the control of the needle valve 1210. In this embodiment, the flow channel 1340 is located on the side of the valve stem, and the flow channel 1340 has a channel inlet 1312 and a flow channel outlet 1313. With the drain channel inlet 1312 located on the outer wall of the valve stem 1208 and the drain channel outlet 1313 located on the wall of the switch channel 1303, thereby enabling the switch channel 1303 to communicate with fluid in the fluid channel 1250.

When the needle valve 1210 is opened, the fluid in the valve body 1205 enters the opening and closing channel 1303 from the drainage channel 1340 and then is communicated with the outside through the needle valve 1210; when the needle 1210 is closed, the fluid in the open-close passage 1303 is disconnected from the outside, so that the fluid in the valve body 1205 cannot communicate with the outside. Accordingly, when it is necessary to know the fluid parameter in the valve body 1205 or to change the internal pressure in the valve body 1205, the needle valve 1210 is opened so that the fluid in the valve body 1205 is communicated with the corresponding equipment of the outside. When it is not necessary to connect an external device, the needle valve 1210 is closed so that the fluid in the valve body 1205 does not leak to the outside. The needle valve used in this embodiment may be a needle valve as shown in FIGS. 3A-3B or FIGS. 6A-6B, and the valve 1200 may achieve a technical effect similar to the valve 100 of FIG. 2A.

FIG. 14 is a ninth embodiment of the valve of the present application, showing another valve 1400. Similar to the valve 1200 shown in FIG. 12A, the difference is that the valve 1400 does not need to be provided with the needle 1210, and the fluid in the valve body can be switched on and off with the outside only by rotating the valve rod 1408. As shown in fig. 14, the flow channel 1440 includes a valve body flow channel 1431 and a valve stem flow channel 1438, the valve stem flow channel 1438 having a valve stem flow channel inlet 1412 and a valve stem flow channel outlet 1413, the valve body flow channel 1431 having a valve body flow channel inlet 1435 and a valve body flow channel outlet 1436. Where the valve stem drainage channel inlet 1412 is located on the outer wall of the side of the valve stem 1408, the outer wall of the valve stem 1408 may be in close proximity to the valve stem drainage channel inlet 1412, which may be in close proximity to the wall of the valve stem receiving cavity 1420. That is, only when the valve stem 1408 is rotated such that the valve body drain passage outlet 1436 is aligned with the valve stem drain passage inlet 1412, the valve body drain passage 1431 and the valve stem drain passage 1438 communicate such that the drain passage 1440 is open; when the valve stem 1408 is rotated such that the valve body drain passage outlet 1436 is misaligned with the valve stem drain passage inlet 1412, the valve body drain passage 1431 and the valve stem drain passage 1438 do not communicate such that the drain passage 1440 is disconnected. A seal 1461 may also be provided near the valve stem drain channel inlet 1412 to enhance the seal at the valve stem drain channel inlet 1412. In this embodiment, turning the valve stem 1408 controls the opening and closing of the fluid conducting channel 1440, thereby controlling the fluid in the valve body 1405 to be communicated or disconnected from the outside without the need for a needle valve. The embodiment shown in fig. 14 can achieve similar effects as the embodiment shown in fig. 12A.

While only certain features of the application have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the application.

Claims

1. A valve, characterized in that it comprises:

a switch passage disposed within the valve stem;

2. The valve of claim 1, wherein:

the valve rod can control the opening and closing of the fluid channel through rotation, and the rotation of the valve rod can control the communication and disconnection of fluid with the outside.

3. The valve of claim 2, further comprising:

4. The valve of claim 2, wherein: the valve body drainage channel is arranged in the valve body, the valve rod drainage channel is arranged in the valve rod, and the valve rod can control the connection and disconnection between the valve rod drainage channel and the valve body drainage channel, so that the connection and disconnection between fluid and the outside are controlled.

5. The valve of claim 2, wherein:

the valve stem is movable up and down with respect to the valve body to open and close the fluid passage through a lower end of the valve stem.

6. The valve of claim 5, wherein:

the flow directing channel is disposed in the valve stem, the flow directing channel configured to communicate the switch channel with the fluid channel.

7. The valve of claim 5, wherein:

the valve body drainage channel is arranged in the valve body, the valve rod drainage channel is arranged in the valve rod, and the valve rod can control the connection and disconnection between the valve rod drainage channel and the valve body drainage channel through rotation, so that the connection and disconnection between fluid and the outside can be controlled.

8. The valve of any one of claims 6 or 7, wherein:

the valve is an angle valve or a gate valve.

9. The valve of claims 1-7, further comprising:

10. The valve of claim 9, wherein:

the bottom diameter of the switch channel is larger than the top diameter of the valve rod drainage channel, so that a step is formed at the joint of the switch channel and the valve rod drainage channel, and the switch device enables fluid to be communicated and disconnected with the outside through abutting against and being far away from the step.

11. The valve of claim 10, wherein:

the switch device is a needle valve.