CN103557352A - Direction-adjustable check valve - Google Patents

Abstract

The invention relates to an adjustable direction check valve, which comprises a valve body, a rubber valve seat, a valve cover, a valve stem, a valve box and a hollow valve ball. There is a shaft sleeve installed on the shaft, which is embedded in the installation blind hole made in the valve body. A valve box is installed on the valve stem for guide adjustment; the valve box is internally formed with a transverse coaxial valve box inner cavity, and both lateral ends of the valve box cavity are limited by limiting steps, and the valve between the limiting steps at the two ends A hollow valve ball is installed coaxially in the box cavity. The invention has the advantages of reasonable structure, safety and reliability, long service life, simple operation, and convenient installation, which effectively improves the reconstruction efficiency of pipeline medium flow direction change, reduces cost, and is energy-saving and high-efficiency.

Description

An adjustable check valve

technical field

The invention belongs to the category of valves, and relates to a check valve, in particular to an adjustable check valve. the

Background technique

At present, in the pipeline system, a one-way check valve is usually installed. Once the flow direction of the medium in the pipeline system changes, the original one-way check valve needs to be dismantled and reinstalled according to the flow direction of the medium, which greatly reduces the cost of the pipeline. The efficiency of road conveying medium also increases various costs. the

After searching, the following relevant patent documents were found:

An adjustable one-way valve (notification number CN202580152U), including a valve body, in which an "O" ring, a steel ball, a spring, and a spiral retaining ring are sequentially arranged along the direction of fluid conduction, and the "O" shape The ring inner diameter is smaller than the inner diameter of the steel ball, the inner diameter of the spring is smaller than the inner diameter of the steel ball, and the distance from the steel ball to the spiral retaining ring is slightly smaller than the natural length of the spring. Adjust the spiral retaining ring so that the "O" ring, steel ball and spring are in elastic contact, which can solve the problem of excessive opening pressure of the liquid. The "O" ring is in close contact with the steel ball to achieve the sealing effect of the "O" ring and prevent Reverse liquid leakage. the

A pressure-adjustable one-way valve (notification number 203272890U), including a valve body (1), a valve core (2) and a spring (3), and also includes an adjusting bolt (4) and a lock nut (5). The adjusting bolt is arranged inside the valve core, one end of the adjusting bolt is in contact with the spring, and the other end of the adjusting bolt extends out of the valve body and is fixed by the locking nut. The pressure-adjustable one-way valve of the present invention adds an adjustment bolt and a lock nut to the original one-way valve, and adjusts the spring force of the spring through the adjustment bolt and the lock nut, thereby realizing the adjustment of the pressure of the one-way valve. Therefore, when the system loop pressure needs to be changed, it is not necessary to disassemble and replace a new one-way valve, but only need to adjust the pressure of the pressure-adjustable one-way valve of the present invention on site, which improves work efficiency and reduces costs. the

A one-way valve (publication number 103234066A), which consists of: a valve body, a valve core, an adjustment knob, and a spring. There is a spool in the valve cavity, the tail of the spool is connected to the spring, the other end of the spring is connected to the adjustment knob, and the adjustment knob is connected to the valve body. The opening pressure of the one-way valve of the invention can be adjusted and the overflow function can effectively control the pipeline pressure. . the

After comparison, the above three disclosed patented technologies adjust the sealing pressure in the one-way valve, but cannot adjust the direction of the medium, which is quite different from the technology of the present application. the

Contents of the invention

The purpose of the present invention is to overcome the disadvantages of the prior art and provide an adjustable direction check valve. the

The present invention realizes the purpose technical scheme is:

An adjustable check valve includes a valve body, a rubber valve seat, a valve cover, a valve stem, a valve box and a hollow valve ball. The medium flow channel connected to the body cavity, the inner end of the medium flow channel is coaxially embedded and fixed with a rubber valve seat; the right end of the valve body is coaxially sealed and fixed with a valve cover through bolts, and the valve cover is equipped with a medium connection with the valve body. The media flow channel coaxially penetrates the flow channel, and the inner end of the valve cover medium flow channel is coaxially embedded and fixed with another rubber valve seat, which is characterized in that:

A valve stem is installed horizontally on the upper part of the valve body, and a shaft sleeve is installed coaxially on the left end of the valve stem.

There is an external thread in the middle of the valve stem inside the valve body chamber, and a valve box is installed on the valve stem through the external thread for guide adjustment;

The interior of the valve box is made with a transverse coaxial inner cavity of the valve box. Limiting steps are restricted at both ends of the valve box cavity. A hollow valve is coaxially installed in the valve box cavity between the limiting steps at the two ends. ball. the

Moreover, the inner wall of the valve body chamber is formed with a plurality of transverse guide ribs, and the plurality of guide ribs are all slidingly fitted with the guide grooves made on the outer wall of the valve box. The valve box is driven by the valve stem on the valve body. The interior of the chamber moves axially along the direction of the guide ribs; and positioning steps for the valve box are provided at the position where the guide ribs are close to the bottom of the valve body. the

Moreover, a middle sealing ring is coaxially press-fitted on the inner side of the contact end surface of the valve body and the valve cover, and multiple O-rings are installed at the contact position of the valve stem and the valve cover. the

Moreover, the limiting step is formed with an arc-shaped end surface that cooperates with the hollow valve ball, and the arc-shaped end surface is sealingly engaged with the hollow valve ball. the

Moreover, the right end of the valve stem protrudes from the valve body and is installed with an indicating sleeve through coaxial rotation, and an indicating needle is formed on the radial side of the indicating sleeve; a protective sleeve is coaxially sleeved outside the valve cover, and an indicating sleeve is formed on the upper end window, and the indicator needle protrudes from the indicator window hole of the protective cover. the

Moreover, an anti-flying-out step is formed coaxially on the valve stem inside the valve cover. the

Moreover, the right end of the valve rod extends out of the valve cover, and a control handle or an electric or pneumatic regulating device is installed. the

Advantage and positive effect of the present invention are:

1. The check flow direction of the check valve can be adjusted. When the flow direction of the pipeline medium changes, the rotatable valve stem drives the axial movement of the valve box on the valve stem to adjust the check in different directions. the

2. There is an indicator needle on the valve stem of the check valve. When the valve stem rotates, the indicator needle can move axially on the valve stem, and the medium flow direction is marked on the protective sleeve. Quickly judge the current flow direction of the medium, which is convenient for observing the working status and adjusting the flow direction of the check valve. the

3. The structure of the check valve has strong stability, the hollow valve ball sealing structure has strong pressure bearing capacity, good sealing effect, effectively guarantees the safety of medium flow, and has a long service life. the

4. The invention has reasonable structure, safety and reliability, long service life, simple operation, and is easy to install, effectively improves the reconstruction efficiency of pipeline medium flow direction change, reduces costs, and is energy-saving and efficient. the

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the present invention

Figure 2 is a schematic diagram of the structure of the stem protection sleeve

Detailed ways

The embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is descriptive, not restrictive, and cannot be used to limit the protection scope of the present invention. the

An adjustable check valve, including a valve body 1, a rubber valve seat 14, a valve cover 6, a valve stem 3, a valve box 2 and a hollow valve ball 12, as shown in Figure 1, the valve body is equipped with a valve Body cavity, the left end of the valve body is horizontally connected with a medium flow channel connected with the valve body cavity, and a rubber valve seat is coaxially embedded and fixed at the inner end of the medium flow channel; a valve seat is coaxially sealed and fixed at the right end of the valve body Cover, the valve cover is formed with a medium flow channel coaxially connected with the medium flow channel of the valve body, and another rubber valve seat is coaxially embedded and fixed at the inner end of the medium flow channel of the valve cover. The medium channel port at the left end is the A terminal, and the medium channel port at the right end is the B terminal. the

In order to ensure the tightness of the installation of the valve body and the valve cover, a middle mouth sealing ring 10 is coaxially pressed on the inner side of the contact end surface of the valve body and the valve cover. the

A valve stem is installed horizontally on the upper part of the valve body above the medium flow channel, and a shaft sleeve 15 is installed coaxially on the left end of the valve stem. The shaft sleeve is embedded in the installation blind hole made in the valve body. And install a control handle or an electric or pneumatic adjustment device; in order to ensure the sealing, multiple O-rings are installed at the contact position between the valve stem and the valve cover. the

The middle part of the valve stem inside the valve body chamber is formed with an external thread, and a valve box is guided and adjusted on the valve stem through the external thread, and a plurality of transverse guide ribs 11 are formed on the valve body wall. The guide groove made on the outer wall of the valve box is slidingly fitted, and the valve box is driven by the valve stem to move axially along the direction of the guide ribs inside the chamber of the valve body; There is a positioning step for the valve box (not numbered in the figure). the

The interior of the valve box is made with a transverse coaxial inner cavity of the valve box. Limiting steps 4 are restricted at both ends of the valve box cavity in the transverse direction. The valve ball, the valve ball can only move freely in the valve box cavity, the valve ball can protrude from the valve box cavity but will not break away from the valve box cavity due to the limit step, and the protruding end of the hollow valve ball is in sealing fit with the inner side of the valve seat. the

The limit step is made with an arc-shaped end face matched with the hollow valve ball, and when the medium pressure hollow valve ball is pushed to the end, the limit step and the hollow valve ball seal fit. the

The right end of the valve stem protrudes from the valve body and is installed with an indicating sleeve 8 through coaxial rotation. An indicating needle 7 is formed on the radial side of the indicating sleeve; Indicating window 16, the indicating needle protrudes from the indicating window hole of the protective sleeve, and moves axially with the movement of the valve cover, and the moving direction of the indicating needle is consistent with the moving direction of the valve box. the

An anti-flying-out step 5 is coaxially formed on the valve stem inside the valve cover, and the anti-flying-out step can be used as a positioning step for the valve box at the same time. the

The working principle of the present invention is:

When the medium enters through the A side, the valve box is moved by turning the valve stem with external force, and the valve box is moved to the A side and positioned by the guide rib near the positioning step of the valve box at the bottom of the valve body, and the indicator needle will also move accordingly. The position near the end A of the visible window on the stem protection sleeve. Under the force of the medium, the valve ball moves in the valve box cavity to the cavity close to the B end, and the medium can flow into the valve body cavity through the gap 13 between the valve body and the valve box, and then flow out through the outlet port; when the A end medium is cut off Finally, the B-end medium will flow back, and under the action of the backflow medium, the valve ball will move to the A-side in the valve box cavity, and will fit and seal with the A-side valve seat sealing ring to prevent the medium from flowing back. When sealing, the step at the chamber end of the valve box will not contact the valve ball, so that the valve ball is sealed by the thrust of the medium in a natural state, thereby achieving the non-return effect. the

When the flow direction of the medium in the pipeline changes, the medium enters through the B end, and the valve box is moved by turning the valve stem with external force, and the valve box is moved to the B end and positioned by the steps on the valve stem, and the indicator needle will also move to the valve stem. The position of the viewing window on the protective cover close to the B end achieves the non-return effect. the

Claims (7)

1. One kind can tuning formula safety check, comprise valve body, rubber valve seat, valve gap, valve rod, clack box and hollow ball valve, valve body middle part is shaped with valve chamber, and valve body left end lateral direction penetrating is shaped with the medium runner being communicated with valve chamber, and the coaxial setting-in of medium runner inner end is fixed with a rubber valve seat; Valve body right-hand member is coaxially fixed with a valve gap by bolt co-axial seal, is shaped with the medium runner with the coaxial perforation of medium runner of valve body on valve gap, and the coaxial setting-in of this valve gap medium runner inner end is fixed with another rubber valve seat, it is characterized in that:

   Described valve body upper lateral is provided with a valve rod, and this valve rod left end is coaxially installed with an axle sleeve, and this axle sleeve is inlaid in installing blind made in valve body, and valve rod right-hand member stretches out valve gap;

   Valve rod middle part in valve chamber inside is shaped with outside thread, and the adjusting of leading on valve rod by this outside thread is provided with a clack box;

   Clack box inside is shaped with the interior cavity of clack box of transverse uniaxial, and the transverse ends of this clack box cavity is all shaped with limited step, the coaxial movable hollow ball valve of installing in the clack box cavity between the limited step at these two ends.
2. 2. according to claim 1 can tuning formula safety check, it is characterized in that: described valve chamber inwall is shaped with many horizontal guiding ribs, these many guiding ribs all coordinate with the made guiding groove slip setting-in of the outer wall of clack box, and this clack box drives the direction along guiding rib in the chamber interior of valve body to move axially by valve rod; And at guiding rib, near valve body bottom position, be equipped with the positioning step of clack box.
3. 3. according to claim 1 can tuning formula safety check, it is characterized in that: described valve body contacts end face inner side and is coaxially pressed with mouth sealing ring in valve gap, at the contact position of valve rod and valve gap, multiple tracks O RunddichtringO is installed.
4. 4. according to claim 1 can tuning formula safety check, it is characterized in that: described limited step is shaped with the curved end coordinating with hollow ball valve, this curved end and hollow ball valve are sealed and matched.
5. 5. according to claim 1 can tuning formula safety check, it is characterized in that: described valve rod right-hand member stretches out valve body and by coaxial rotation, one indicating sleeve is installed, and this indicating sleeve radially side is shaped with pointer; The outer coaxial sleeve of valve gap is equipped with a protecting jacket, and this protecting jacket upper end is shaped with an indication window, and described pointer is stretched out by the indication fenestra of protecting jacket.
6. 6. according to claim 1 can tuning formula safety check, it is characterized in that: on the valve rod of described valve gap inner side, be coaxially shaped with the anti-step that flies out.
7. 7. according to claim 1 can tuning formula safety check, it is characterized in that: described valve rod right-hand member stretches out valve gap, and Joystick or electronic, pneumatic regulation unit be installed.

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