A filter cartridge with replaceable nut

Abstract

A kind of filter core of screw cap replaceable, including filter core body and screw cap, the upper end of filter core body and screw cap are assembled together, and after being assembled, the separation of the two is prevented by connecting piece, and when screw cap and filter core body are installed together in valve body, screw cap is connected with valve body by rotating, connecting piece is detachably connected in the upper end of filter core body.The beneficial effects of the utility model lie in that screw cap is not replaced together when filter core body is replaced subsequently, which reduces cost, when filter core body is arranged in valve body, screw cap is connected with valve body by rotating as independent rotating part, and filter core body does not rotate together when screw cap rotates.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter core technical field especially a filter core of screw cap replaceable. BACKGROUND

[0002] The working medium of the coal mine fully mechanized working face hydraulic support system is emulsion, and in order to ensure normal work of the hydraulic support, impurities in the emulsion need to be filtered. The automatic backwashing filter is a filtering device which uses a filter screen to intercept impurities in the emulsion, purifies the emulsion, reduces system pollution, and protects normal work of the system and other equipment.

[0003] Publication (announcement) No. CN217015574U discloses an automatic backwashing filter, which comprises a valve body, a liquid inlet A / A1, a liquid outlet B / B1, C / C1 and a backwashing port H are formed in the valve body, a plurality of valve core assemblies and filter assemblies are arranged in the valve body, a connecting channel is arranged between the valve core assemblies and the filter assemblies, and the automatic backwashing filter further comprises a pilot valve filter, an electromagnetic pilot valve and a liquid return check valve. The liquid outlet is sequentially communicated with the piston rod liquid cavity through the pilot valve filter and the electromagnetic pilot valve, so that the backwashing direction is controlled; and the electromagnetic pilot valve returns liquid through the liquid return check valve and is communicated with the backwashing port H. The filter assembly of the automatic backwashing filter is composed of a second screw sleeve, a shaft steel wire retainer and a filter core. The second screw sleeve is assembled with the filter assembly by being threadedly connected with the valve body. However, the filter assembly is consumable, and the filter core will cause the filtering effect to decrease over time, so that a new filter core needs to be replaced. In the present application, the second screw sleeve and the filter core are assembled together through the shaft steel wire retainer. Although this assembly mode can realize assembly of the second screw sleeve and the filter core, the second screw sleeve and the filter core cannot be separated, so that the second screw sleeve needs to be replaced together during replacement of the filter core. The second screw sleeve is a connecting component, and the effective service life of the second screw sleeve is longer than that of the filter core. Therefore, replacement of the filter core will cause the cost to increase. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the above-mentioned defects of the prior art and provides a filter core with replaceable screw caps to solve the above-mentioned problems.

[0005] The utility model solves the technical problems by adopting the following technical scheme: the filter core with replaceable screw caps comprises a filter core body and a screw cap. The upper end of the filter core body and the screw cap are assembled together, and a connecting piece is arranged to prevent separation of the two after assembly. When the screw cap and the filter core body are installed together in the valve body, the screw cap is connected to the valve body by rotating. The connecting piece is detachably connected to the upper end of the filter core body.

[0006] Further improvement, the upper end of the filter core body has an insertion space, the screw cap includes a valve body connecting part and a filter core connecting part, the valve body connecting part is connected with the valve body when the filter core body and the screw cap are installed in the valve body together, the filter core connecting part is inserted into the insertion space, and the filter core connecting part is prevented from being separated from the insertion space under the action of the connecting piece after being inserted, the insertion space has a connecting column connected with the connecting part of the connecting piece at the central position of the insertion space, and the connecting column limits the filter core connecting part at the central position of the insertion space by being inserted into the through hole formed between the valve body connecting part and the filter core connecting part.

[0007] Further improvement, the outer periphery of the filter core connecting part is in a stepped configuration, the inner periphery of the insertion space is in a stepped configuration, and the outer periphery of the large-diameter segment of the filter core connecting part and the inner periphery of the small-diameter segment of the insertion space are both provided with a threaded structure, so that the filter core connecting part is inserted into the insertion space in a screw rotation manner.

[0008] Further improvement, the bottom surface of the large-diameter segment of the filter core connecting part and the bottom surface of the large-diameter segment of the insertion space are left with a first spacing, the top surface of the large-diameter segment of the filter core connecting part and the top surface of the large-diameter segment of the insertion space are left with a second spacing, and the distance of the first spacing is smaller than the distance of the second spacing.

[0009] Further improvement, the inner periphery of the through hole is in a stepped configuration, the hole part of the small-diameter segment of the through hole is used for inserting the connecting column, the hole part of the middle-diameter segment of the through hole is used for placing the blocking part of the connecting piece and part of the connecting column, and the hole part of the large-diameter segment of the through hole is used for placing part of the blocking part of the connecting piece and inserting the plug.

[0010] Further improvement, the bottom surface of the blocking part of the connecting piece and the bottom surface of the middle-diameter segment of the through hole are left with a third spacing, and the distance of the third spacing is smaller than the distance of the second spacing.

[0011] Further improvement, the plug is in a T-shaped configuration.

[0012] The beneficial effects of the utility model are as follows:

[0013] The screw cap of the utility model is not replaced together when the filter core body is replaced subsequently, so that the cost is reduced, the filter core body is arranged in the valve body, the screw cap is connected with the valve body by rotating independently, and the filter core body does not rotate together when the screw cap rotates. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a half-section structure schematic view of the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described below with reference to the drawings:

[0016] Referring to the drawings: the filter core of this screw cap is replaceable, including filter core body 1 and screw cap 2, the upper end of filter core body 1 and screw cap 2 are assembled together, and after assembly, the two are prevented from separating by connecting piece 3, and when screw cap 2 and filter core body 1 are installed together into the valve body, screw cap 2 is connected with the valve body by rotating, and connecting piece 3 is detachably connected to the upper end of filter core body 1. The principle of the utility model lies in that screw cap 2 and filter core body 1 are assembled together first, connecting piece 3 is arranged behind screw cap 2 and then connected with filter core body 1 to keep the assembled state of screw cap 2 and filter core body 1, and the connection is detachable, so that when filter core body 1 is replaced subsequently, screw cap 2 does not need to be replaced together, the cost is reduced, and meanwhile, considering that filter core body 1 and screw cap 2 are arranged together in the valve body, screw cap 2 is the part connected with the valve body (connected by the threaded connection mode), under the action of connecting piece 3, filter core body 1 does not rotate together with screw cap 2 in the connecting process (screw cap 2 rotates), the setting is considered that the greater the length, the greater the moment generated, and the moment will cause the end of filter core body 1 to shake when threaded connection, the shaking will affect the smoothness of threaded connection, therefore, by allowing screw cap 2 to rotate only, the situation can be avoided, and the installation process is smooth. In the embodiment, connecting piece 3 is arranged as a bolt.

[0017] The upper end of the filter core body 1 has an insertion space 11, the screw cap 2 includes a valve body connecting part 21 and a filter core connecting part 22, the valve body connecting part 21 is connected with the valve body when the filter core body 1 and the screw cap 2 are installed into the valve body together, the filter core connecting part 22 is inserted into the insertion space 11, and after being inserted, it is prevented from being separated from the insertion space 11 under the action of the connecting piece 3, the insertion space 11 has a connecting column 4 at the central position of the insertion space 11, which is connected with the connecting part of the connecting piece 3, the connecting column 4 limits the filter core connecting part 22 at the central position of the insertion space 11 by being inserted into the through hole 23 formed between the valve body connecting part 21 and the filter core connecting part 22, so that the filter core body 1 and the screw cap 2 can be combined into one, that is, the filter core connecting part 22 is inserted into the insertion space 11, and when the insertion space 11 is formed, the connecting column 4 is inserted into the through hole 23, so that the outer periphery of the connecting column 4 and the inner periphery of the through hole 23 are in contact, so that the screw cap 2 and the filter core body 1 have obvious advantages in resisting shear, torsion, vibration and impact load, and the overall structure, rigidity and load capacity can be greatly enhanced, especially in resisting lateral force, the connecting column 4 is obtained when the insertion space 11 is formed, and the main purpose is to realize the connection with the connecting part of the connecting piece 3, and the limitation of the filter core connecting part 22 at the central position of the insertion space 11 is the key strategy to improve the connection reliability, prolong the service life and reduce the maintenance cost, especially in high vibration, impact or alternating load scene, the central design is the preferred solution to avoid asymmetric failure, and the connecting column 4 is also used to connect with the connecting piece 3 which is also inserted into the through hole 23, so as to prevent the separation of the assembled filter core body 1 and the screw cap 2.

[0018] The outer periphery of the filter core connecting part 22 is in a stepped configuration, the inner periphery of the insertion space 11 is in a stepped configuration, and the outer periphery of the large-diameter section of the filter core connecting part 22 and the inner periphery of the small-diameter section of the insertion space 11 are provided with thread structures, so that the filter core connecting part 22 is inserted into the insertion space 11 in a screwing manner, so that the filter core connecting part 22 of the screw cap 2 is not inserted into the filter core body 1 in a single insertion form, but is inserted into the filter core body 1 in a screwing manner by using the thread structure, according to the stepped configuration of the outer periphery of the filter core connecting part 22 and the inner periphery of the insertion space 11, the thread structure of the filter core connecting part 22 can be placed in a non-thread structure (large-diameter section of the insertion space 11) after passing through the thread structure of the insertion space 11, and the thread structure of the filter core connecting part 22 is limited in the non-thread structure by the connecting piece 3, so that the state of the filter core connecting part 22 inserted into the insertion space 11 is maintained, and here the connecting piece 3 is used as a anti-loosening piece and also as a limiting piece, that is, preventing the thread structure of the screw cap 2 and the thread structure of the insertion space 11 from being threadedly matched when the screw cap 2 is rotated, so that the screw cap 2 can be freely rotated.

[0019] The bottom surface of the large outer diameter section of the filter core connecting part 22 and the bottom surface of the large inner diameter section of the insertion space 11 are left with a first spacing 5, the top surface of the large outer diameter section of the filter core connecting part 22 and the top surface of the large inner diameter section of the insertion space 11 are left with a second spacing 6, the distance of the first spacing 5 is smaller than the distance of the second spacing 6, the upper and lower end surfaces of the large outer diameter section of the filter core connecting part 22 with the threaded structure are not in frictional contact through the first spacing 5 and the second spacing 6, so that the rotation is smooth when the nut 2 is rotated, and the efficiency is increased when the nut 2 is connected with the valve body.

[0020] The inner circumferential surface of the through hole 23 is in a stepped configuration, the hole part of the small inner diameter section is used for inserting the connecting column 4, the hole part of the inner and middle inner diameter sections is used for inserting the blocking part of the connecting piece 3 and part of the connecting column 4, the hole part of the large inner diameter section is used for inserting part of the blocking part of the connecting piece 3 and the plug 7, so that the through hole 23 can allow the connecting column 4 to be inserted, can allow the connecting piece 3 to be inserted, can be provided with the plug 7, and can use the connecting piece 3 as a limiting piece, that is, prevent the threaded structure of the nut 2 from being screwed with the threaded structure of the insertion space 11 when the nut 2 is rotated, so that the nut 2 can be freely rotated, and the plug 7 is used to seal and protect the connecting piece 3, so as to avoid rust and other adverse conditions of the connecting piece 3.

[0021] The bottom surface of the blocking part of the connecting piece 3 and the bottom surface of the middle inner diameter section of the through hole 23 are left with a third spacing 8, the distance of the third spacing 8 is smaller than the distance of the second spacing 6, so that the upper surface of the large outer diameter section of the filter core connecting part 22 and the connecting piece 3 are not in frictional contact through the third spacing 8 when the nut 2 is driven and rotated, the rotation is smooth when the nut 2 is rotated, and the distance of the third spacing 8 is smaller than the distance of the second spacing 6, which is considered that the nut 2 may be moved upward during rotation, and the larger distance can prevent the large outer diameter section of the filter core connecting part 22 from entering the small inner diameter section of the insertion space 11, that is, does not hinder the free rotation of the nut 2.

[0022] The plug 7 is in a T-shaped configuration, that is, the plug 7 has an insertion part and a sealing part, the insertion part is inserted into the hole part of the large inner diameter section of the through hole 23 and abuts against the blocking part of the connecting piece 3, the outer diameter of the sealing part is larger than the inner diameter of the large inner diameter section of the through hole 23 and covers the upper end surface of the valve body connecting part 21, can block the through hole 23, avoid impurities or water and other media from entering, so as to well isolate and protect the connecting piece 3, and avoid rust and other adverse conditions of the connecting piece 3.

[0023] Although the utility model has been illustrated and described by referring to the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details can be made within the scope of the claims.

Claims

1. A filter cartridge with replaceable nut, comprising a filter cartridge body (1) and a nut (2), characterized in that: The upper end of the filter core body (1) and the screw cap (2) are assembled together, and after assembly, the two are prevented from being separated by the connecting piece (3), and when the screw cap (2) and the filter core body (1) are installed together into the valve body, the screw cap (2) is connected with the valve body by rotating, and the connecting piece (3) is detachably connected to the upper end of the filter core body (1).

2. The cap-removable filter cartridge according to claim 1, characterized in that: The upper end of the filter core body (1) has an insertion space (11), the screw cap (2) includes a valve body connecting part (21) and a filter core connecting part (22), the valve body connecting part (21) is connected with the valve body when the filter core body (1) and the screw cap (2) are installed together into the valve body, and the filter core connecting part (22) is inserted into the insertion space (11), and after insertion, it is prevented from being separated from the insertion space (11) under the action of the connecting piece (3), the insertion space (11) has a connecting column (4) at the central position of the insertion space (11), which is connected with the connecting part of the connecting piece (3), and the connecting column (4) limits the filter core connecting part (22) at the central position of the insertion space (11) by being inserted into the through hole (23) formed between the valve body connecting part (21) and the filter core connecting part (22).

3. The cap-removable filter cartridge of claim 2, wherein: The outer periphery of the filter core connecting part (22) is in a stepped configuration, the inner periphery of the insertion space (11) is in a stepped configuration, and the outer periphery of the large-diameter section of the filter core connecting part (22) and the inner periphery of the small-diameter section of the insertion space (11) are provided with threaded structures, so that the filter core connecting part (22) is inserted into the insertion space (11) by screw rotation.

4. The cap-removable filter cartridge of claim 3, wherein: The bottom surface of the large-diameter section of the filter core connecting part (22) and the bottom surface of the large-diameter section of the insertion space (11) have a first spacing (5), and the top surface of the large-diameter section of the filter core connecting part (22) and the top surface of the large-diameter section of the insertion space (11) have a second spacing (6), and the distance of the first spacing (5) is smaller than the distance of the second spacing (6).

5. The cap-removable filter cartridge of claim 4, wherein: The inner periphery of the through hole (23) is in a stepped configuration, the hole part of the small-diameter section is for inserting the connecting column (4), the hole part of the middle-diameter section is for inserting the blocking part of the connecting piece (3) and part of the connecting column (4), and the hole part of the large-diameter section is for inserting part of the blocking part of the connecting piece (3) and the plug (7).

6. The cap-removable filter cartridge of claim 5, wherein: The bottom surface of the blocking part of the connecting piece (3) and the bottom surface of the middle-diameter section of the through hole (23) have a third spacing (8), and the distance of the third spacing (8) is smaller than the distance of the second spacing (6).

7. The cap-removable filter cartridge of claim 5, wherein: The plug (7) is in a T-shaped configuration.

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