CN210290863U

CN210290863U - Check valve capable of rapidly sampling

Info

Publication number: CN210290863U
Application number: CN201921115539.6U
Authority: CN
Inventors: 刘伟国; 李江河
Original assignee: Wenzhou Guangji Valve Co Ltd
Current assignee: Wenzhou Guangji Valve Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-04-10
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses a check valve capable of quickly sampling, which comprises a valve body, a valve cover, a flow passage, a valve rod, a valve core and a valve seat, wherein a movable cavity is arranged in the valve core, a limiting block is arranged at the upper end of the valve core, a quick sampling device is arranged on the valve body, the quick sampling device comprises a shell, a push rod, a sealing slide block, a positioning seat, a first driving spring, a second driving spring and an end cover, the shell is provided with an inner cavity, a sampling inlet and a sampling outlet, and the section width of the sealing slide block is larger than the width; the end cover and the shell are fixed through a locking bolt, the end cover is provided with a first mounting groove, the shell is provided with a second mounting groove, the push rod is at least provided with two stroke positions according to the screwing depth of the locking bolt into the shell, and when the push rod is located at the first stroke position, the sealing slide block seals the sampling inlet; when the push rod is located at the second stroke position, the sealing slide block opens the sampling inlet. The utility model has the advantages of it is following and effect: the check valve in operation may be sampled.

Description

Check valve capable of rapidly sampling

Technical Field

The utility model relates to the technical field of valves, in particular to check valve that can take a sample fast.

Background

The check valve is a valve which is used for preventing the media from flowing backwards by automatically opening and closing a valve clack depending on the flow of the fluid media. Can be divided into a lifting check valve, a swing check valve and a butterfly check valve according to the structure.

In order to determine the parameters of the fluid medium in the check valve passage, it is necessary to sample the fluid medium, but the check valve seals the flow passage in the fully closed state, and sampling cannot be performed. If sample when the check valve is idle, need dismantle the pipeline of being connected with the check valve and take a sample again, it is very troublesome to operate, and the fluid medium existence volume in the stop valve is few, can't take a sample in a large number and carry out big data comparison.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a but check valve of quick sample can take a sample the check valve under the operating condition.

The above technical purpose of the present invention can be achieved by the following technical solutions: a check valve capable of quickly sampling comprises a valve body and a valve cover arranged at the upper end of the valve body, wherein a flow passage for fluid medium to flow is arranged in the valve body, a valve rod penetrating through the flow passage is vertically arranged on the valve cover, a valve core is arranged at one end of the valve rod, the flow passage is provided with a valve seat in sealing fit with the valve core, a movable cavity for the valve rod to slide along the axial direction of the valve core is arranged in the valve core, a limiting block for preventing the valve rod from falling off the movable cavity is fixedly arranged at the upper end of the valve core, a quick sampling device is arranged at the position of the valve body corresponding to the flow passage and comprises a shell, a push rod, a sealing slide block, a positioning seat, a first driving spring, a second driving spring and an end cover, the shell is of a hollow structure and is provided with an inner cavity along the transverse direction, and one side of the, a sampling outlet communicated with the outside is formed in one side of the shell, which is back to the flow passage, and the sampling inlet is communicated with the sampling outlet through an inner cavity; the push rod, the sealing slide block and the positioning seat are sequentially arranged in the inner cavity, the end cover is fixedly arranged at one end, close to the push rod, of the shell and used for supporting the push rod to prevent the push rod from falling out of the inner cavity, the positioning seat is fixedly damped with the inner wall of the inner cavity, the sealing slide block is positioned between the push rod and the positioning seat, the first driving spring is arranged between the sealing slide block and the push rod in a compressed mode, the second driving spring is arranged between the sealing slide block and the positioning seat in a compressed mode, the width of the cross section of the sealing slide block is larger than that of a sampling inlet, and the sampling inlet can be sealed by the sealing slide block through sliding; the end cover and the shell are fixed through a locking bolt, the end cover is provided with a first mounting groove, the shell is provided with a second mounting groove, the first mounting groove and the second mounting groove are both provided with inner peripheral threads, the locking bolt is sequentially screwed into the first mounting groove and the second mounting groove to fix the end cover on the shell, and the push rod is at least provided with two stroke positions according to the depth of screwing of the locking bolt into the shell; when the push rod is located at the second stroke position, the sealing slide block moves towards the push rod under the reset acting force of the second driving spring, so that the sealing slide block opens the sampling inlet.

The further setting is that: and a plurality of sealing rings are fixedly arranged on both sides of the sealing slide block.

The further setting is that: the valve core is fixedly provided with a plurality of cushion blocks at the lower end of the movable cavity.

The utility model has the advantages that:

1. when traditional check valve is in operating condition, fluid medium's sample collection is comparatively difficult, the utility model discloses to this condition, set up quick sampling device in the runner, utilize quick sampling device can gather the fluid medium who is in under the dynamic flow, practical application's feedback is respond well, has brought very big facility for staff's sample work.

2. The inner cavity of the rapid sampling device is used as a center to be connected with the sampling inlet and the sampling outlet, the sampling inlet is communicated with the flow channel to be used for collecting the fluid medium in the flow channel in real time, and therefore the fluid medium can flow out to the outside through the sampling inlet, the inner cavity and the sampling outlet in sequence to realize sampling.

3. Consider how to open/close quick sampling device's problem, the utility model designs a structure of push rod, sealed spout and positioning seat, through the position that changes the push rod to change first drive spring's decrement, and then the change of the effort that the decrement that is changed by first drive spring brought, make second drive spring carry out the adjustment of self decrement, thereby let the sealed slider between first drive spring and the second drive spring slide under effort between them, with the realization to sampling channel's sealed or open. The structure has the advantage of strong sliding stability, can not generate the condition of sudden sliding of stress, is stable and has the buffering effect, and can effectively prolong the service life of long-term use.

4. The utility model discloses a change the degree of depth of locking bolt precession casing, utilize second drive spring's effort that resets to realize opening fast, convenience of customers in time accomplishes sample work, has come very big promotion for the ageing of sample.

5. The utility model discloses still have the advantage of making things convenient for the later stage maintenance, the accessible pulls down the end cover, can take out parts such as push rod, sealed slider, a drive spring in proper order, makes things convenient for the maintenance work in later stage, improves quick sampling device's life.

6. The sealing rings on the two sides of the sealing slide block play a role in further enhancing the sealing performance, and the characteristic that the sealing rings are easy to generate elastic deformation under the action of a compression load is utilized to seal the tiny unevenness between the slide block rod and the inner cavity wall, so that the sealing is further realized; and the quantity of sealing washer has a plurality ofly, guarantees the leakproofness as far as.

7. When fluid medium in the flow channel exerts impact acting force on the valve core towards the direction of the valve rod, the impact force exerted on the valve rod by the valve core can be reduced through the arrangement of the buffer piece, and therefore the service lives of the valve core and the valve rod are prolonged.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of the rapid sampling device according to the embodiment when the sealing slider seals the sampling inlet (the push rod is located at the first stroke position);

FIG. 4 is a schematic structural diagram of the rapid sampling device according to the embodiment when the sealing slider opens the sampling inlet (the push rod is located at the second stroke position).

In the figure: 11. a valve body; 12. a valve cover; 13. a flow channel; 14. a valve stem; 15. a valve core; 16. a valve seat; 17. a movable cavity; 18. a limiting block; 19. buffering cushion blocks; 21. a housing; 22. a push rod; 23. sealing the sliding block; 24. positioning seats; 25. a first drive spring; 26. a second drive spring; 27. an inner cavity; 28. an end cap; 31. a sampling inlet; 32. a sampling outlet; 41. a locking bolt; 42. a first mounting groove; 43. a second mounting groove; 51. a seal ring; 61. a first stroke position; 62. a second stroke position.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 4, a check valve capable of sampling quickly includes a valve body 11 and a valve cover 12 disposed on the upper end of the valve body 11, a flow passage 13 for fluid medium to flow is provided in the valve body 11, a valve rod 14 penetrating the flow passage 13 is vertically mounted on the valve cover 12, a valve core 15 is mounted at one end of the valve rod 14 located on the flow passage 13, the flow passage 13 is provided with a valve seat 16 forming a sealing fit with the valve core 15, a movable cavity 17 for the valve rod 14 to slide along the axial direction of the movable cavity is provided in the valve core 15, and a limit block 18 for preventing the valve rod 14 from coming out of the movable cavity 17 is. The upper end of the valve rod 14 is generally provided with an actuator or a handle (not shown in the figure) for driving the valve rod 14 to move up and down along the self axial direction, and simultaneously, the valve rod 14 can drive the valve core 15 to move synchronously, so that the valve core 15 is utilized to cut off and communicate the flow passage 13; a movable cavity 17 is arranged in the valve core 15, and the movement of the valve core 15 is pushed by the flow of the fluid medium so as to realize the automatic opening and closing of the valve body 11. The above structure is the basic structure of the check valve, and belongs to the prior art, so it is not described here.

The valve body 11 is provided with a rapid sampling device corresponding to the position of the flow passage 13, the rapid sampling device comprises a shell 21, a push rod 22, a sealing slide block 23, a positioning seat 24, a first driving spring 25, a second driving spring 26 and an end cover 28, the shell 21 is of a hollow structure and is provided with an inner cavity 27 along the transverse direction, one side of the shell 21 facing the flow passage 13 is provided with a sampling inlet 31 communicated with the flow passage 13, one side of the shell 21 opposite to the flow passage 13 is provided with a sampling outlet 32 communicated with the outside, and the sampling inlet 31 and the sampling outlet 32 are communicated through the inner cavity 27;

the push rod 22, the sealing slide block 23 and the positioning seat 24 are sequentially arranged in the inner cavity 27, the end cover 28 is fixedly arranged at one end of the shell 21 close to the push rod 22 and is used for supporting the push rod 22 to prevent the push rod 22 from falling out of the inner cavity 27, the positioning seat 24 is fixedly damped with the inner wall of the inner cavity 27, the sealing slide block 23 is positioned between the push rod 22 and the positioning seat 24, the first driving spring 25 is arranged between the sealing slide block 23 and the push rod 22 in a compression mode, the second driving spring 26 is arranged between the sealing slide block 23 and the positioning seat 24 in a compression mode, the section width of the sealing slide block 23 is larger than the width of the sampling inlet 31 and the sampling outlet 32, and the sampling inlet;

the end cover 28 and the housing 21 are fixed through a locking bolt 41, the end cover 28 is provided with a first mounting groove 42, the housing 21 is provided with a second mounting groove 43, the first mounting groove 42 and the second mounting groove 43 are both provided with inner peripheral threads, the locking bolt 41 is sequentially screwed into the first mounting groove 42 and the second mounting groove 43 to fix the end cover 28 on the housing 21, and the push rod 22 has at least two stroke positions according to the screwing depth of the locking bolt 41 into the housing 21, when the push rod 22 is located at the first stroke position 61, the push rod 22 can compress the first driving spring 25 and push the sealing slider 23 to move towards the positioning seat 24, so that the sealing slider 23 seals the sampling inlet 31 and compresses the second driving spring 26;

when the push rod 22 is located at the second stroke position 62, the sealing slider 23 is moved toward the push rod 22 by the return force of the second drive spring 26, so that the sealing slider 23 opens the sampling inlet 31.

The further setting is that: a plurality of sealing rings 51 are fixedly arranged on both sides of the sealing slider 23.

The further setting is that: the valve core 15 is fixedly provided with a plurality of cushion blocks 19 at the lower end of the movable cavity 17.

The utility model discloses a theory of operation is:

referring to fig. 3, the locking bolt 41 is completely screwed into the first mounting groove 42 and the second mounting groove 43, which pushes the end cover 28 to move towards the right, the push rod 22 is blocked by the end cover 28 to be in the first stroke position 61, the force generated by the first driving spring 25 acts on the sealing slider 23 and makes it move towards the right, the sealing slider 23 compresses the second driving spring 26 and seals the sampling inlet 31, and the fluid medium entering from the sampling inlet 31 cannot flow out from the sampling outlet 32 because of being blocked by the sealing slider 23;

referring to fig. 4, the locking bolt 41 is not completely screwed into the second mounting groove 43, the screwing depth can be adjusted according to the actual situation, at this time, since the push rod 22 is pushed to abut against the end cover 28 under the action of the first driving spring 25, the push rod 22 is located at the second stroke position 62, the compression amount of the first driving spring 25 is reduced, the second driving spring 26 in the compressed state is reset and pushes the sealing slider 23 to move towards the left, the sealing slider 23 opens the sampling inlet 31 due to the movement, and the fluid medium entering from the sampling inlet 31 can flow out through the inner cavity 27 and the sampling outlet 32; the elastic coefficient of first drive spring 25 and second drive spring 26 can be adjusted according to actual conditions to satisfy the requirement that promotes sealing slide 23 and remove, the utility model discloses it is good to show in practical application, and wherein sealing slide 23's removal is steady, can not take place the condition that the atress suddenly becomes and slide suddenly.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a check valve that can take a sample fast, includes valve body (11) and sets up in valve gap (12) of valve body (11) upper end, valve body (11) in seted up runner (13) that supply the fluid medium circulation, valve gap (12) on vertically install valve rod (14) of wearing to establish to runner (13), valve rod (14) be located the one end of runner (13) and install case (15), runner (13) be provided with and constitute sealed complex disk seat (16) with case (15), case (15) in be provided with and supply valve rod (14) to carry out the activity chamber (17) that slide along its axial, case (15) upper end fixed be provided with stopper (18) that prevent valve rod (14) to deviate from activity chamber (17), its characterized in that:

the rapid sampling device is arranged at a position, corresponding to the flow channel (13), of the valve body (11), and comprises a shell (21), a push rod (22), a sealing slide block (23), a positioning seat (24), a first driving spring (25), a second driving spring (26) and an end cover (28), wherein the shell (21) is of a hollow structure and is provided with an inner cavity (27) along the transverse direction, a sampling inlet (31) communicated with the flow channel (13) is formed in one side, facing the flow channel (13), of the shell (21), a sampling outlet (32) communicated with the outside is formed in one side, facing away from the flow channel (13), of the shell (21), and the sampling inlet (31) and the sampling outlet (32) are communicated through the inner cavity (27);

the push rod (22), the sealing slide block (23) and the positioning seat (24) are sequentially arranged in the inner cavity (27), the end cover (28) is fixedly arranged at one end of the shell (21) close to the push rod (22) and is used for supporting the push rod (22) to prevent the push rod (22) from falling out of the inner cavity (27), the positioning seat (24) is fixed with the inner wall of the inner cavity (27) in a damping way, the sealing slide block (23) is positioned between the push rod (22) and the positioning seat (24), and the first driving spring (25) is compressed and arranged between the sealing slide block (23) and the push rod (22), the second driving spring (26) is compressed and arranged between the sealing sliding block (23) and the positioning seat (24), the section width of the sealing slide block (23) is larger than the width of the sampling inlet (31), the sealing slide block (23) can seal the sampling inlet (31) by sliding;

the end cover (28) and the shell (21) are fixed through a locking bolt (41), the end cover (28) is provided with a first mounting groove (42), the shell (21) is provided with a second mounting groove (43), the first mounting groove (42) and the second mounting groove (43) are both provided with inner peripheral threads, the locking bolt (41) is screwed into the first mounting groove (42) and the second mounting groove (43) in sequence to fix the end cover (28) on the shell (21), and the push rod (22) has at least two stroke positions according to the depth of the locking bolt (41) screwed into the shell (21), when the push rod (22) is positioned at the first stroke position (61), the push rod (22) can compress the first driving spring (25) and push the sealing slide block (23) to move towards the positioning seat (24), thereby causing the sealing slide (23) to seal the sampling inlet (31) and compress the second drive spring (26);

when the push rod (22) is located at the second stroke position (62), the sealing slide block (23) is moved towards the push rod (22) under the reset acting force of the second driving spring (26), so that the sealing slide block (23) opens the sampling inlet (31).

2. A rapid sampling check valve as claimed in claim 1, wherein: and a plurality of sealing rings (51) are fixedly arranged on both sides of the sealing slide block (23).

3. A rapid sampling check valve as claimed in claim 1, wherein: the valve core (15) is fixedly provided with a plurality of cushion blocks (19) at the lower end of the movable cavity (17).