CN117167497A - valve - Google Patents

Abstract

The application discloses a valve, which comprises a front shell, a rear shell, an inner valve seat, a valve core and a driving piece, wherein the front shell is provided with a front channel extending along the axial direction, and the front channel is provided with a first section and a second section along the axial direction. The front end of back casing is connected and is equipped with the back passageway that extends along the axis direction with the rear end of front housing, and the diapire of back passageway and front passageway intercommunication and back passageway is equipped with the case installation position, and the front end of case installation position is interior section, and the diapire of interior section, diapire of second section to the diapire of first section reduce or interior section's diapire, the diapire of second section and the diapire parallel and level of first section in proper order. The inner valve seat is arranged in the rear channel and is connected with the inner wall of the rear channel in a sealing way; the valve core is positioned in the rear channel and is rotatably connected with the valve core mounting position; the driving piece penetrates through the rear shell, and the driving valve core is in pressing contact with the inner valve seat to close the rear channel or is separated from the inner valve seat to open the rear channel. The valve can effectively prevent hydrops in the front shell or the rear shell.

Description

Valve

Technical Field

The application relates to the technical field of storage containers, in particular to a valve.

Background

The existing valve for the medium-sized bulk storage container, such as a butterfly valve, is opened in such a way that a rotating shaft in the middle of a valve core rotates to drive two sides of the valve core to rotate for opening, and because the valve core is generally positioned in the valve body, the flow of the valve core is influenced by the valve core and the rotating shaft; the sealing property is poor. Because of the friction between the butterfly valve sealing ring and the valve body, the force for opening and closing the valve is large.

Recently, guide slot type lifting rod ball valves have been developed at home and abroad, and an S-shaped guide slot is arranged on a valve rod and is matched with a guide pin, so that when the valve rod ascends, a ball body is driven to separate from a valve seat, and then the valve rod rotates 90 degrees anticlockwise, and the valve is completely opened. When the valve rod descends, the ball body is driven to rotate 90 degrees clockwise and then is pressed against the valve seat to close the valve, and the technical defects are that the valve rod is provided with a long S-shaped guide groove, and when the valve rod is opened and closed in a rotating mode, the valve rod needs to ascend or descend in the guide groove in a spiral mode, so that the guide groove occupies large space, and the rotating angle is large.

The Chinese patent application number 99124192.4 discloses a disc-shaped double-track type rotary propped valve opening and closing structure, which is formed by combining a fixed disc, a rotary disc and a limiting pin, when an external force drives a valve rod and drives the limiting pin together with the rotary disc, the limiting pin rotates clockwise along the track of an arc track on the fixed disc, when the limiting pin rotates to the linear track connected with the arc track, the rotary disc continuously rotates clockwise, the limiting pin is propped against the periphery of the fixed disc under the forced action of the linear track on the rotary disc, and at the moment, the limiting pin and a valve sealing structural member face a valve seat, and the valve is closed. When the valve rod and the rotary disk rotate anticlockwise, under the forced action of the 'bracing' track on the rotary disk, the limiting pin and the sealing structural member of the valve are firstly folded towards the center of the fixed disk according to the 'straight line' track on the fixed disk, and then the valve is opened according to the anticlockwise rotation of the 'circular arc' track on the fixed disk.

Chinese patent 200620105067 describes a rail type plug valve, which comprises a valve body, a valve cover, an operating member, a valve rod, a valve seat, a valve plug and a rail type mechanism, wherein the valve plug and the valve seat form a conical surface sealing pair, the rail type mechanism consists of a rail ring installed on the neck of the valve plug and provided with two guide grooves, a double-pin plate provided with two guide pins which are pinned into the guide grooves, and a lock nut and an adjusting ring for adjusting the installation position of the rail ring; the transmission device has more parts and complex assembly process;

in addition, the valve plug with the conical surface sealing pair, the locking nut for adjusting the installation position of the track ring and the adjusting ring are required to be adjusted for a plurality of times, so that the operation is complex.

The general plastic valve seal is the extrusion seal towards the screw thread mouth direction, if there is high temperature steam disinfection's demand like this, the case of valve can be under the effect of steam, moves to the direction of keeping away from interior disk seat, must use the very strong of the very high price of intensity and structure simultaneously like this, and undoubtedly the cost can increase very much.

In a general sealing structure, after the valve core is sealed, a sunken concave part is arranged in a threaded opening and an internal cavity of the shell, so that liquid can remain in the concave part after multiple discharge or bottom filling, and cleaning is not facilitated.

Disclosure of Invention

The application aims to provide a valve for solving the problems of the prior art.

In order to solve the above technical problems, an embodiment of the present application provides a valve, including:

a front housing having a front channel extending in an axial direction, the front channel having a first section and a second section along the axial direction;

the front end of the rear shell is connected with the rear end of the front shell and is provided with a rear channel extending along the axis direction, the rear channel is communicated with the front channel, the bottom wall of the rear channel is provided with a valve core mounting position, the part of the rear channel positioned at the front end of the valve core mounting position is an inner section, and the bottom wall of the inner section, the bottom wall of the second section and the bottom wall of the first section are sequentially lowered; or the bottom wall of the inner section, the bottom wall of the second section and the bottom wall of the first section are positioned on the same plane;

the inner valve seat is arranged in the rear channel and is connected with the inner wall of the rear channel in a sealing way;

the valve core is positioned in the rear channel and is rotatably connected with the valve core mounting position; and

the driving piece penetrates through the rear shell and is used for driving the valve core to be in extrusion contact with the inner valve seat so as to close the rear channel or driving the valve core to be separated from the inner valve seat so as to open the rear channel.

In one embodiment, the bottom wall of the inner section, the bottom wall of the second section, and the bottom wall of the first section are gradually lowered.

In one embodiment, the bottom wall of the inner section is planar.

In one embodiment, the bottom wall of the second section is planar.

In one embodiment, the bottom wall of the second section is flush with the bottom wall of the first section.

In one embodiment, the second section tapers in size from the rear end of the front housing to the first section.

In one embodiment, the top wall of the second section is formed by a bottom wall of the second section extending circumferentially, the top wall of the second section being a truncated cone.

In one embodiment, the first segment is annular; the center of the second section in the vertical direction is higher than the center of the first section.

In one embodiment, the valve core is of a flat structure, and a positioning rod is arranged at the bottom end of the valve core; the valve core installation position is provided with a rod hole for inserting the positioning rod; the driving piece drives the valve core to rotate around the axis of the positioning rod so as to open or close the rear channel.

In one embodiment, the valve further comprises:

the outer valve seat is arranged at the front end of the front shell; and

a valve cover operable to cover the front end of the front housing and seal against the outer valve seat.

In one embodiment, the valve further comprises a flange sealingly connected to the rear end of the rear housing.

The application changes the bottom wall height of the front channel of the front shell and the bottom wall height of the rear channel part of the rear shell, and ensures that the bottom wall of the inner section of the rear channel is higher than or equal to the bottom wall height of the second section of the front channel, and the bottom wall height of the second section is higher than or equal to the bottom wall height of the first section, thereby effectively preventing the phenomenon of effusion in the front shell or the rear shell.

Drawings

Fig. 1 is an exploded view of a valve according to one embodiment of the present application.

Fig. 2 is an assembled view of the valve in the embodiment of fig. 1.

Fig. 3 is a cross-sectional view of the valve in the embodiment of fig. 2.

Fig. 4 is a perspective view of the rear housing in the embodiment shown in fig. 1.

Fig. 5 is a perspective view of the front housing in the embodiment shown in fig. 1.

Reference numerals: 100. a valve; 1. a front housing; 11. a front channel; 111. a first section; 1111. a bottom wall of the first section; 112. a second section; 1121. a cone; 1122. a bottom wall of the second section; 113. an outflow port; 114. a stop block; 2. a rear housing; 21. a rear channel; 211. an inner section; 2111. a bottom wall of the inner section; 212. a middle section; 2121. a rod hole; 213. an outer section; 214. an inflow port; 215. a cross beam; 3. an inner valve seat; 4. a valve core; 41. a positioning rod; 5. a driving member; 6. an outer valve seat; 7. a valve cover; 8. a flange; 9. a seal ring; x, axis direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

The following detailed description of various embodiments of the present application will be provided in connection with the accompanying drawings to provide a clearer understanding of the objects, features and advantages of the present application. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the application, but rather are merely illustrative of the true spirit of the application.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present application, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

The present application relates to a valve 100, as shown in fig. 1 and 2, the valve 100 includes a front housing 1, a rear housing 2, an inner valve seat 3, a valve core 4, a driving member 5, an outer valve seat 6, a valve cover 7, a sealing ring 9, and a flange 8.

The front housing 1 has a front passage 11 extending in an axis direction X, and the rear housing 2 has a rear passage 21 extending in the axis direction X. The rear end of the front housing 1 in the axis direction X is fixedly connected with the front end of the rear housing 2 in the axis direction X, and the connection manner of the front housing 1 and the rear housing 2 may be an adhesive manner, a welding manner, a back-off manner, or the like, and the present application is not limited to the specific connection manner of the front housing 1 and the rear housing 2.

The front passage 11 of the front housing 1 and the rear passage 21 of the rear housing 2 communicate in the axial direction X to form a liquid flow passage. The rear end opening of the rear case 2 is an inflow port 214, and the front end opening of the front case 1 is an outflow port 113, and liquid can flow into the liquid flow path from the inflow port 214 of the rear case 2 and out from the outflow port 113 of the front case 1.

The rear channel 21 of the rear housing 2 is also provided with a valve core installation position, the valve core 4 is of a flat structure and is installed in the rear channel 21 of the rear housing 2, and the bottom end of the valve core 4 is rotatably connected with the valve core installation position. The inner valve seat 3 is disposed in the rear passage 21 closer to the rear end of the rear housing 2 than the valve spool 4, and the inner valve seat 3 is sealingly connected to the inner wall of the rear passage 21. The driving piece 5 penetrates through the top wall of the rear shell 2 and is connected with the top end of the valve core 4, the driving piece 5 can drive the valve core 4 to rotate, the valve core 4 can press and contact the inner valve seat 3 after rotating so as to close the rear channel 21, or the driving valve core 4 is separated from the inner valve seat 3 so as to open the rear channel 21, and then the liquid flow channel is opened and closed.

The front end of the front housing 1 is provided with a threaded opening on the outside for matching a conventional filling opening or other conventional equipment, that is to say, the threaded opening is also of conventional dimensions, i.e. the front end of the front housing 1 cannot be changed substantially. While the first section 111 of the front housing 1 is located at the front end of the front housing 1, the size of the first section 111 cannot be substantially changed. However, the valve body 4 has a flat structure, and in order to facilitate the opening and closing of the valve body 4 in the liquid flow path, the second section 112 of the front housing 1 and the rear passage 21 of the rear housing 2 need to have a sufficient space to accommodate the valve 100, so that the space between the second end 112 of the front housing 1 and the rear passage 21 of the rear housing 2 is generally designed to be larger than that of the first section 111, and thus the valve 100 has a gourd-shaped structure in which the middle is large but the front and rear ends are small when viewed from the outside after the front housing 1 and the rear housing 2 are connected. After the liquid flows out of the front case 1 from the rear case 2, since the outflow port 113 of the front case 1 is small, the bottom is often liquid-collecting, and cleaning is very inconvenient.

The front channel 11 has a first section 111 and a second section 112 in the axial direction X, the first section 111 being near the front end and the second section 112 being near the rear end as shown in fig. 5. In the rear passage 21, along the axis direction X, the front end portion of the spool mounting position is an inner section 211, the rear end portion of the spool mounting position is a rear section, the spool mounting position is located at a middle section 212, and the inner section 211, the middle section 212 and an outer section 213 are sequentially communicated. The inner section 211 abuts against the second section 112 of the front case 1, and the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section, and the bottom wall 1111 of the first section are lowered in order. After the valve core 4 is opened, the liquid flows into the liquid flow channel from the inflow port 214 of the rear housing 2 and then flows out through the outflow port 113, and as the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section and the bottom wall 1111 of the first section are sequentially lowered, the liquid can smoothly flow from the valve core 4 to the inner section 211, the second section 112 to the first section 111 and then flows out from the outflow port 113 of the first section 111, no liquid accumulation phenomenon is generated, and the cleaning is convenient.

The front end of the front housing 1 is threaded for matching a conventional filling opening or device, i.e. the size of the threaded opening cannot be substantially changed. The valve body 4 has a flat structure, and in order to facilitate the opening and closing of the valve body 4 in the liquid flow path, the liquid flow path needs to have a certain space, so that the front housing 1 and the rear housing 2 of the valve 100 are connected, and have a gourd-shaped structure with a large middle but a small front and rear end when viewed from the outside. After the liquid flows from the rear housing 2 to the front housing 1, since the outflow port 113 of the front housing 1 is small, the bottom is often liquid-collecting, and cleaning is very inconvenient.

For this reason, the application changes the shape of the bottom walls of the front housing 1 and the rear housing 2, and the bottom wall of the front housing 1 is arranged lower than the bottom wall of the rear housing 2 or is flush with the bottom wall which can be arranged at the rear, thereby facilitating the outflow and cleaning of liquid.

As a preferred embodiment, as shown in fig. 3, the bottom wall 2111 of the inner section and the bottom wall 1122 of the second section are flat surfaces that abut against each other, the first section 111 is annular, and the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section, and the bottom wall of the first section 111 are all flush.

In the conventional design, the inner section 211 is generally an annular inner wall, and the bottom wall of the annular inner wall is lower than the bottom wall of the front housing 1, so that liquid accumulation is likely to occur. In order to prevent the liquid from being filled in the liquid volume, the cross beam 215 is added on the annular inner wall, as shown in fig. 4, the top surface of the cross beam 215 and the top of the annular inner wall jointly form the inner wall of the inner section 211, the top surface of the cross beam 215 is a plane, and the top surface of the cross beam 215 is the bottom wall 2111 of the inner section. It is understood that the top surface of the cross member 215 is higher than the bottom wall of the annular inner wall in the conventional design, so that the liquid accumulation can be prevented.

In addition, the inner wall of the second section 112 of the conventional design is generally a cone 1121, that is, a cone 1121 gradually decreasing from the rear end of the rear housing 2 to the first section 111, and the bottom wall of the cone 1121 near the rear end is lower than the bottom wall 1111 of the first section, so that liquid is accumulated in the second section 112 during the process of flowing from the rear housing 2 into the front housing 1, and the accumulated liquid is not easy to clean because the bottom wall 1122 of the second section is lower than that of the first section 111. In the embodiment shown in fig. 5, the stop 114 is positioned at the bottom of the cone 1121 and the top surface is a plane, the top surface of the stop 114 and the top inner wall of the cone 1121 form the inner wall of the second section 112, the top surface of the stop 114 is the bottom wall 1122 of the second section, and the top surface of the stop 114 is also higher than the bottom wall of the cone 1121, so that the liquid can be prevented from accumulating on the bottom wall of the cone 1121.

The top surface of the stop block 114 in the second section 112 is flush with the top surface of the cross beam 215, and after flowing in from the rear housing 2, the liquid can flow out from the first section 111 after flowing through the cross beam 215 and the stop block 114, and because the top surface of the cross beam 215, the top surface of the stop block 114 and the bottom wall 1111 of the first section are flush, the liquid can smoothly flow out from the first section 111, and cannot flow into the bottom wall of the annular inner wall and the bottom wall of the cone 1121, and cleaning is convenient.

In addition, the bottom wall 1122 of the second section is planar, but the top wall of the second section 112 is also the top of the cone 1121, i.e., the truncated cone shape, which can be regarded as the bottom wall 1122 of the second section extending circumferentially, so that the overall size of the inner wall of the second section 112 gradually decreases from the rear end of the front housing 1 to the first section 111, facilitating smooth discharge of liquid.

The first section 111 is in a circular ring shape with a center, and the bottom wall 1122 of the second section is flush with the first section 111, and the top wall of the second section 112 is a cone 1121, that is, the top end of the highest position of the second section 112 is higher than the top wall of the first section 111, so that the center of the second section 112 in the vertical direction is higher than the center of the first section 111, that is, the center of the second section 112 in the vertical direction moves upwards due to the increase of the stop block 114.

Alternatively, the top surface of the cross member 215 of the inner section 211 is higher than the top surface of the stopper 114, or the top surface of the stopper 114 is higher than the bottom wall 1111 of the first section, that is, the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section, and the bottom wall 1111 of the first section are sequentially lowered or flush. For example, the inner section bottom wall 2111 may be higher than or equal to the second section bottom wall 1122, while the second section bottom wall 1122 may be higher than or flush with the first section bottom wall 1111, i.e., the inner section bottom wall 2111, the second section bottom wall 1122, and the first section bottom wall 1111 may form a stepped down form.

For another example, the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section and the bottom wall 1111 of the first section are curved surfaces or inclined surfaces gradually decreasing from the rear end to the front end, the front end of the bottom wall 2111 of the inner section is higher than the bottom wall of the rear end of the second section 112 or is flush with the bottom wall of the rear end of the second section 112, and the bottom wall of the front end of the second section 112 and the bottom wall of the rear end of the first section 111 are flush with or higher than the bottom wall of the rear end of the first section 111, that is, the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section and the bottom wall 1111 of the first section gradually decrease, and the curved surfaces or inclined surfaces gradually decreasing from the rear end to the front end are formed by the three, so that liquid can flow out from the rear housing 2 to the front housing 1 without causing a hydrops phenomenon.

As can be seen from the above, the bottom wall 1122 of the second stage and the bottom wall 1111 of the first stage may be flat surfaces, or may be gradually lowered from the rear end to the front end, the downward depression portion may not be formed, the bottom wall 2111 of the inner stage may not be lower than the bottom wall 1122 of the second stage, and the bottom wall 1122 of the second stage may not be lower than the bottom wall 1111 of the first stage, so as to prevent liquid accumulation. It should be appreciated that in other embodiments, the bottom wall 2111 of the inner section is planar, the bottom wall 1122 of the second section is curved, gradually descending from back to front, and the bottom wall 1122 of the second section is lower than the bottom wall 2111 of the inner section, while the inner wall of the first section 111 is annular, and the bottom wall of the rear end of the first section 111 engages the bottom wall of the front end of the second section 112, i.e., the bottom wall of the rear end of the first section 111 matches the bottom wall of the front end of the second section 112 in shape. In another embodiment, the bottom wall 2111 of the inner section is curved and the bottom wall 1122 of the second section is planar and lower than the bottom wall 2111 of the inner section.

The bottom wall 2111 of the inner section, the bottom wall 1122 of the second section, and the bottom wall 1111 of the first section all decrease in order from the rear end to the front end, that is, include the case where the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section, and the bottom wall 1111 of the first section intermittently decrease, for example, the bottom wall 2111 of the inner section is higher than the bottom wall 1122 of the second section but the bottom wall 1122 of the second section is flush with the bottom wall 1111 of the first section, and also include the case where the bottom wall 2111 of the inner section, the bottom wall 1122 of the second section, and the bottom wall 1111 of the first section gradually decrease in transition; the inner bottom wall 2111, the second bottom wall 1122, and the first bottom wall 1111 may be gradually or slowly lowered from their rear ends to their front ends, respectively, and the inner bottom wall 2111, the second bottom wall 1122, and the first bottom wall 1111 may not be recessed with liquid. That is, the essence of the present application is to raise the bottom wall 1122 of the second section of the front housing 1 and the bottom wall 2111 of the inner section of the rear housing 2 to a position not lower than the bottom wall 1111 of the first section to facilitate liquid discharge and cleaning of the inner space of the liquid flow path.

The front end referred to in the present application is an end portion near the outflow port 113, the rear end is an end portion near the inflow port 214 of the rear housing 2, and the top and bottom ends are the top and bottom ends, respectively, in the embodiment shown in fig. 3.

The bottom end of the valve core 4 is provided with a positioning rod 41, the valve core mounting position is provided with a rod hole 2121 for inserting the positioning rod 41, the positioning rod 41 of the valve core 4 is more than in the rod hole 2121, and the driving member 5 drives the valve core 4 to rotate around the axis of the positioning rod 41 so as to open or close the rear channel 21.

The front end face of the front housing 1 is provided with an annular groove for accommodating the outer valve seat 6, which extends circumferentially around the front end of the front housing 1. The outer valve seat 6 is located in the annular recess and protrudes slightly beyond the front end of the annular recess. The valve cover 7 is operable to cover the front end of the front housing 1 and is screwed with the front housing 1, and the inner wall of the valve cover 7 is sealed against the outer valve seat 6, so that the valve cover 7 and the front housing 1 are connected hermetically. The valve cover 7 can be detached from the front housing 1, namely, the valve 100 is detached when being opened for use, and the valve 100 is closed when not being used.

The rear end of the rear housing 2 is in sealing connection with the flange 8 through a sealing ring 9, and the sealing ring 9 is located between the rear end of the rear housing 2 and the inner wall of the flange 8, so that the flange 8 is in sealing connection with the rear end of the rear housing 2.

The top end of the valve core 4 is provided with a guide post, the rear shell 2 is provided with a guide groove which is opened towards the direction of the valve core 4, and the guide groove extends along the axial direction X of the rear channel 21. The driving piece 5 can drive the valve core 4 to rotate, and the guide post is opposite to the notch of the guide groove, and the driving piece 5 drives one end of the valve core 4 connected with the valve core to move towards the direction axis of the inner valve seat 3, so that the guide post is inserted into the guide groove. The driving piece 5 is continuously rotated, and at the moment, the driving piece 5 does not drive the valve core 4 to rotate, but enables the valve core 4 to deviate to the direction of the inner valve seat 3 along the extending direction of the rear channel 21, the guide post is inserted into the guide groove, and the valve core 4 and the inner valve seat 3 are tightly attached to realize sealing. When the valve core 4 moves axially towards or away from the inner valve seat 3, the part, connected with the driving piece 5, of the valve core 4 moves, and the valve core 4 is driven to slightly incline towards or away from the inner valve seat 3, so that the valve core 4 can be clung to the inner valve seat 3, and the closing effect of the valve 100 is better. The way in which the driver 5 and the spool 4 of the present application are mated is referred to as application No. 202310511372X and application No. 2023105113804. It should be understood that the driving direction of the driving member 5 and the valve element 4 of the present application is not limited to the embodiment of 202310511372X and 2023105113804, and the valve element 4 may be driven to move by other means.

The outlet 113 of the valve 100 of the present application may be used as an inlet for liquid, and for example, when filling is required, the outlet 113 of the valve 100 may be used as an inlet. At this time, after the liquid is introduced through the outflow port 113 of the front case 1, the liquid is prevented from accumulating in the front case 1 and the rear case 2, and the internal liquid is cleaned.

The application changes the bottom wall height of the front channel 11 of the front shell 1 and the bottom wall height of the rear channel 21 part of the rear shell 2, and makes the bottom wall of the inner section 211 of the rear channel 21 be higher than or equal to the bottom wall 1122 height of the second section of the front channel 11, and the bottom wall 1122 height of the second section is higher than or equal to the bottom wall 1111 height of the first section, thereby effectively preventing the hydrops phenomenon in the front shell 1 or the rear shell 2.

While the preferred embodiments of the present application have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the application and that various changes in form and details may be made therein without departing from the spirit and scope of the application.

Claims (11)

1. A valve, comprising:

a front housing having a front channel extending in an axial direction, the front channel having a first section and a second section along the axial direction;

the front end of the rear shell is connected with the rear end of the front shell and is provided with a rear channel extending along the axis direction, the rear channel is communicated with the front channel, the bottom wall of the rear channel is provided with a valve core mounting position, the part of the rear channel positioned at the front end of the valve core mounting position is an inner section, and the bottom wall of the inner section, the bottom wall of the second section and the bottom wall of the first section are sequentially lowered; or the bottom wall of the inner section, the bottom wall of the second section and the bottom wall of the first section are positioned on the same plane;

the inner valve seat is arranged in the rear channel and is connected with the inner wall of the rear channel in a sealing way;

the valve core is positioned in the rear channel and is rotatably connected with the valve core mounting position; and

the driving piece penetrates through the rear shell and is used for driving the valve core to be in extrusion contact with the inner valve seat so as to close the rear channel or driving the valve core to be separated from the inner valve seat so as to open the rear channel.

2. The valve of claim 1, wherein the bottom wall of the inner section, the bottom wall of the second section, and the bottom wall of the first section are progressively lower.

3. The valve of claim 1, wherein the bottom wall of the inner section is planar.

4. A valve according to claim 1 or 3, wherein the bottom wall of the second section is planar.

5. The valve of claim 4, wherein the bottom wall of the second section is flush with the bottom wall of the first section.

6. The valve of claim 4, wherein the second section tapers in size from the rear end of the front housing to the first section.

7. The valve of claim 5, wherein the top wall of the second section is formed by a bottom wall of the second section extending circumferentially, the top wall of the second section being frustoconical.

8. The valve of claim 1, wherein the first segment is annular; the center of the second section in the vertical direction is higher than the center of the first section.

9. The valve according to claim 1, wherein the valve core is of a flat structure, and a positioning rod is arranged at the bottom end of the valve core; the valve core installation position is provided with a rod hole for inserting the positioning rod; the driving piece drives the valve core to rotate around the axis of the positioning rod so as to open or close the rear channel.

10. The valve of claim 1, wherein the valve further comprises:

the outer valve seat is arranged at the front end of the front shell; and

a valve cover operable to cover the front end of the front housing and seal against the outer valve seat.

11. The valve of claim 1, further comprising a flange sealingly connected to a rear end of the rear housing.