CN110617350A - Straight-through type adjustable one-way valve - Google Patents

Abstract

The invention belongs to the technical field of one-way valves and discloses a through-type adjustable one-way valve. In the straight-through adjustable check valve provided by the present invention, the first valve body, the second valve body and the adjusting seat are coaxially arranged, and the two ends of the adjusting seat are respectively threadedly connected with the first valve body and the second valve body, and the adjusting seat There is a spring between the first valve body; the first valve body and the second valve body are coaxially arranged, one end of the adjustment seat is threaded with the first valve body, and the other end is threaded with the second valve body, and the adjustment seat and the second valve body are threaded. A spring is provided between the first valve body; the valve core is assembled inside the first valve body, one end of the spring is connected to the adjustment seat, and the other end is sleeved on the valve core; the locking and positioning component is arranged on the first valve body, and the lock The tight positioning component is configured to be able to lock the adjusting seat. The straight-through adjustable check valve can realize the online adjustment of the cracking pressure of the check valve, so as to realize the simple adjustment and control of the pressure of the whole fluid pressure system, and has the advantages of simple structure, convenient and quick operation, accurate and reliable.

Description

A Straight-through Adjustable Check Valve

technical field

The invention relates to the technical field of one-way valves, in particular to a through-type adjustable one-way valve.

Background technique

The one-way valve is a device that can control the flow direction of the fluid. It realizes the one-way flow of the fluid medium by controlling the one-way opening of the fluid flow channel, and prevents the reverse flow of the fluid in the system. It is often used in fluids such as liquids or gases. On the pipeline, it is used to control the one-way flow of fluid. In addition, the one-way valve can not only control the one-way flow of fluid, but also has the function of maintaining pressure. By setting the opening pressure of the one-way valve, the system pressure at the front end of the one-way valve can be guaranteed.

Check valves are generally divided into two types: straight-through check valves and right-angle check valves. As shown in Figure 1, the structure of the traditional straight-through check valve currently on the market mainly includes a valve body 1', a valve seat 2', a valve core 3', a spring 4' and a sealing ring 5'. When the opening pressure of the valve, the valve core 3' opens the medium to flow through the one-way valve, when the pressure does not reach the opening pressure, the one-way valve remains closed, thereby preventing the medium from flowing forward, and the one-way valve can always prevent the medium from flowing reverse circulation.

The opening pressure of the one-way valve of this kind of structure has been determined after the assembly is completed and cannot be changed. If you want to adjust the opening pressure, you can only replace the spring and then re-calibrate. The operation is inconvenient and the cycle is long. However, in the actual use process, many pressure systems still need to be re-adjusted when they arrive at the site and put into operation after they are calibrated in the factory. At this time, if the system pressure needs to be adjusted, the traditional check valve does not have the function of adjusting the cracking pressure. , will bring great difficulties to on-site operations, and at the same time prolong the time for product commissioning and production. Therefore, there is an urgent need for a straight-through adjustable check valve with simple structure, reliability and practicality to solve the above problems.

Contents of the invention

The purpose of the present invention is to provide a straight-through adjustable check valve, which realizes online adjustment of the opening pressure of the check valve, and has the advantages of simple structure, convenient adjustment, reliability and practicality.

For reaching this purpose, the present invention adopts following technical scheme:

A straight-through adjustable check valve, comprising:

a first valve body and a second valve body;

The adjustment seat is arranged coaxially with the first valve body and the second valve body, and the two ends of the adjustment seat are respectively threaded with the first valve body and the second valve body. A spring is provided between the seat and the first valve body;

The valve core is assembled inside the first valve body, one end of the spring is connected to the adjustment seat, and the other end is sleeved on the valve core;

A locking and positioning component is arranged on the first valve body, and the locking and positioning component is configured to be able to lock the adjusting seat.

As a preferred technical solution of the straight-through adjustable one-way valve, the locking and positioning assembly includes a threaded through hole provided on the first valve body, and a locking screw penetrated in the threaded through hole, The bottom end of the locking screw can abut against the adjusting seat.

As a preferred technical solution of the straight-through adjustable one-way valve, the inside of the adjustment seat is provided with a containing groove and a flow hole communicating with the containing groove, and one end of the spring is clamped in the containing groove Inside, the other end is sleeved on the step of the valve core.

As a preferred technical solution of the straight-through adjustable one-way valve, a central flow passage is provided inside the first valve body, and the valve core includes an opening and closing end pierced in the central flow passage, connected to the The baffle at the opening and closing end and the step connected to the baffle, the baffle is used to block or open the central flow channel.

As a preferred technical solution of the straight-through adjustable check valve, the opening and closing end is in clearance fit with the central flow channel.

As a preferred technical solution of the straight-through adjustable one-way valve, two opposite adjustment holes are arranged on the outer wall of the adjustment seat along the axis direction perpendicular to the adjustment seat, and the adjustment holes are used to insert a force applying tool. to turn the adjustment seat.

As a preferred technical solution of the straight-through adjustable one-way valve, the outer wall of the adjustment seat is provided with an annular first thread groove and a second thread groove, and the first thread groove is used for connecting with the first valve body. threaded connection, the second threaded groove is used for threaded connection with the second valve body, and the first threaded groove and the second threaded groove are respectively located on both sides of the adjustment hole.

As a preferred technical solution of the straight-through adjustable check valve, a first sealing ring is provided between the first valve body and the adjustment seat, and a first sealing ring is provided between the second valve body and the adjustment seat. Two sealing rings.

As a preferred technical solution of the straight-through adjustable one-way valve, the outer wall of the adjustment seat is provided with an annular first sealing groove and a second sealing groove, and the first sealing groove is located far away from the first threaded groove. One side of the second threaded groove, the first sealing groove is used to accommodate the first sealing ring, the second sealing groove is located on the side of the second threaded groove away from the first threaded groove, so The second sealing groove is used for accommodating the second sealing ring.

Compared with prior art, advantage and beneficial effect of the present invention are:

In the straight-through adjustable check valve provided by the present invention, the first valve body, the second valve body and the adjusting seat are coaxially arranged, and the two ends of the adjusting seat are respectively threadedly connected with the first valve body and the second valve body, and the adjusting seat There is a spring between the first valve body; the first valve body and the second valve body are coaxially arranged, one end of the adjustment seat is threaded with the first valve body, and the other end is threaded with the second valve body, and the adjustment seat and the second valve body are threaded. A spring is provided between the first valve body; the valve core is assembled inside the first valve body, one end of the spring is connected to the adjustment seat, and the other end is sleeved on the valve core; the locking and positioning component is arranged on the first valve body, and the lock The tight positioning component is configured to be able to lock the adjusting seat. The straight-through adjustable check valve can realize the online adjustment of the cracking pressure of the check valve, so as to realize the simple adjustment and control of the pressure of the whole fluid pressure system, and has the advantages of simple structure, convenient and quick operation, accurate and reliable.

Description of drawings

Fig. 1 is a sectional view of a common straight-through check valve in the prior art;

Fig. 2 is a cross-sectional view of a straight-through adjustable check valve provided by a specific embodiment of the present invention;

Fig. 3 is a cross-sectional view of the adjustment seat provided by the specific embodiment of the present invention.

In the picture:

1', valve body; 2', valve seat; 3', valve core; 4', spring; 5', sealing ring;

1. The first valve body; 2. The second valve body;

3. Adjusting seat; 31. Accommodating groove; 32. Flow hole; 33. Adjusting hole; 34. First threaded groove; 35. Second threaded groove; 36. First sealing groove; 37. Second sealing groove;

4. Spring;

5. Spool; 51. Opening and closing end; 52. Baffle; 53. Step;

6. Locking and positioning components; 61. Locking screws;

7. The first sealing ring; 8. The second sealing ring.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

This embodiment discloses a straight-through adjustable check valve, which has the advantages of simple structure, convenient and quick operation, accurate and reliable, etc., and can realize online adjustment of the opening pressure of the check valve, thereby realizing the simple and convenient pressure adjustment of the entire fluid pressure system. Regulation, suitable for all industrial equipment and piping systems using straight-through check valves, such as pressure vessel systems with one-way flow.

As shown in FIG. 2 , the straight-through adjustable check valve mainly includes a first valve body 1 , a second valve body 2 , an adjustment seat 3 , a valve core 5 and a locking and positioning assembly 6 . Wherein, the first valve body 1, the second valve body 2 and the adjusting seat 3 are coaxially arranged, and the two ends of the adjusting seat 3 are screwed to the first valve body 1 and the second valve body 2 respectively, so that the one-way The flow path inside the valve is linear. A spring 4 is provided between the adjustment seat 3 and the first valve body 1; the valve core 5 is assembled inside the first valve body 1, one end of the spring 4 is connected to the adjustment seat 3, and the other end is sleeved on the valve core 5; the lock The tight positioning component 6 is arranged on the first valve body 1 , and the locking positioning component 6 is configured to be able to lock the adjusting seat 3 . By setting the locking and positioning assembly 6, online adjustment of the opening pressure of the one-way valve can be realized, and the structure is simple and the operation is quick.

Specifically, the locking and positioning assembly 6 includes a threaded through hole arranged on the first valve body 1 and opened along the axial direction perpendicular to the first valve body 1, and a locking screw 61 penetrated in the threaded through hole, The bottom end of the locking screw 61 can abut against the adjusting seat 3 . During the use of the one-way valve, only need to loosen the locking screw 61, and then turn the adjusting seat 3 to control the compression of the spring 4, thereby controlling the opening pressure of the one-way valve, and tighten the locking screw 61 after the adjustment is in place. The adjustment of the opening pressure of the one-way valve is realized. The structure is simple to operate, online adjustable, convenient, fast, accurate and reliable.

In this embodiment, as shown in FIG. 3 , an accommodation groove 31 and a flow hole 32 communicating with the accommodation groove 31 are provided inside the adjustment seat 3 . One end of the spring 4 is clamped in the accommodation groove 31 , and the other end It is sleeved on the step 53 of the valve core 5 .

Further, as shown in FIG. 2 , the first valve body 1 is provided with a central flow passage inside, and the valve core 5 includes an opening and closing end 51 pierced in the central flow passage, a baffle 52 connected to the opening and closing end 51 and The step 53 connected to the baffle 52 is used to block or open the central channel. Preferably, the opening and closing end 51 is in clearance fit with the central flow channel, so as to facilitate the opening and closing of the valve core 5 .

In this embodiment, as shown in FIG. 3 , two sealing grooves, two thread grooves and two adjusting holes 33 are provided on the outer wall of the adjusting seat 3 . Specifically, two opposite adjustment holes 33 are arranged on the outer wall of the adjustment seat 3 along the axis direction perpendicular to the adjustment seat 3, and the adjustment holes 33 are used to insert a force applying tool to rotate the adjustment seat 3, thereby adjusting the compression of the spring 4 quantity.

An annular first thread groove 34 and a second thread groove 35 are also provided on the outer wall of the adjustment seat 3 , and the first thread groove 34 and the second thread groove 35 are respectively located on both sides of the adjustment hole 33 . The first thread groove 34 is used for threaded connection with the first valve body 1 , and the second thread groove 35 is used for threaded connection with the second valve body 2 . It should be noted that the first threaded groove 34 and the second threaded groove 35 mentioned here can be internal threads or external threads. Correspondingly, the first valve body 1 and the second valve body 2 are provided with external threads Or internal thread, this embodiment is not specifically limited, as long as the screw connection between the adjusting seat 3 and the first valve body 1 and the second valve body 2 can be realized.

In this embodiment, the sealing performance between the adjustment seat 3 and the first valve body 1 and the second valve body 2 is guaranteed by the sealing ring. Specifically, a first sealing ring 7 is provided between the first valve body 1 and the regulating seat 3 , and a second sealing ring 8 is provided between the second valve body 2 and the regulating seat 3 .

Furthermore, an annular first seal groove 36 and a second seal groove 37 are provided on the outer wall of the adjustment seat 3, the first seal groove 36 is located on the side of the first thread groove 34 away from the second thread groove 35, the first seal groove The groove 36 is used to accommodate the first sealing ring 7 , the second sealing groove 37 is located on the side of the second threaded groove 35 away from the first threaded groove 34 , and the second sealing groove 37 is used to accommodate the second sealing ring 8 . By setting the first sealing groove 36 and the second sealing groove 37, the first sealing ring 7 and the second sealing ring 8 can be placed stably, thereby ensuring the reliability of the sealing connection between the first valve body 1 and the adjustment seat 3 and the second Second, the reliability of the sealing connection between the valve body 2 and the adjustment seat 3.

The method of using the straight-through adjustable check valve provided in this embodiment is as follows: when the cracking pressure of the check valve needs to be adjusted online, loosen the locking screw 61 in the first valve body 1, and then insert the wrench into the adjustment In the adjustment hole 33 on the seat 3, the compression amount of the spring 4 can be adjusted by rotating the adjustment seat 3, thereby controlling the opening pressure of the check valve. After the adjustment is in place, tighten the locking screw 61 to complete the adjustment of the opening pressure of the check valve.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (9)

1. A straight-through adjustable check valve, characterized in that, comprising: The first valve body (1) and the second valve body (2); The adjustment seat (3) is arranged coaxially with the first valve body (1) and the second valve body (2), and the two ends of the adjustment seat (3) are respectively connected to the first valve body ( 1) It is threadedly connected with the second valve body (2), and a spring (4) is provided between the adjustment seat (3) and the first valve body (1); The spool (5) is assembled inside the first valve body (1), one end of the spring (4) is connected to the adjustment seat (3), and the other end is sheathed on the spool (5) superior; The locking and positioning component (6) is arranged on the first valve body (1), and the locking and positioning component (6) is configured to be able to lock the adjusting seat (3). 2. The straight-through adjustable check valve according to claim 1, characterized in that, the locking and positioning component (6) includes a threaded through hole provided on the first valve body (1), and a through hole A locking screw (61) is provided in the threaded through hole, and the bottom end of the locking screw (61) can abut against the adjusting seat (3). 3. The straight-through adjustable one-way valve according to claim 1, characterized in that, the interior of the adjustment seat (3) is provided with an accommodating groove (31) and a valve communicating with the accommodating groove (31). In the flow hole (32), one end of the spring (4) is clamped in the accommodating groove (31), and the other end is sleeved on the step (53) of the valve core (5). 4. The straight-through adjustable check valve according to claim 3, characterized in that, the first valve body (1) is provided with a central flow channel inside, and the valve core (5) includes a The opening and closing end (51) in the central flow channel, the baffle (52) connected to the opening and closing end (51) and the step (53) connected to the baffle (52), the baffle (52) is used to block or open the central flow channel. 5. The straight-through adjustable check valve according to claim 4, characterized in that, the opening and closing end (51) is in clearance fit with the central flow channel. 6. The straight-through adjustable one-way valve according to claim 1, characterized in that, the outer wall of the adjustment seat (3) is provided with two opposite An adjustment hole (33), the adjustment hole (33) is used for inserting a force applying tool to rotate the adjustment seat (3). 7. The straight-through adjustable check valve according to claim 6, characterized in that, the outer wall of the adjustment seat (3) is provided with an annular first threaded groove (34) and a second threaded groove (35) , the first threaded groove (34) is used for threaded connection with the first valve body (1), and the second threaded groove (35) is used for threaded connection with the second valve body (2), so The first thread groove (34) and the second thread groove (35) are respectively located on both sides of the adjustment hole (33). 8. The straight-through adjustable check valve according to claim 7, characterized in that a first sealing ring (7) is arranged between the first valve body (1) and the adjustment seat (3), A second sealing ring (8) is arranged between the second valve body (2) and the adjustment seat (3). 9. The straight-through adjustable check valve according to claim 8, characterized in that, the outer wall of the adjustment seat (3) is provided with an annular first sealing groove (36) and a second sealing groove (37) , the first seal groove (36) is located on the side of the first thread groove (34) away from the second thread groove (35), and the first seal groove (36) is used to accommodate the first Sealing ring (7), the second sealing groove (37) is located on the side of the second threaded groove (35) away from the first threaded groove (34), the second sealing groove (37) is used for Accommodates the second sealing ring (8).