CN209256813U - A kind of maintenance unit suitable for back fluid spool - Google Patents

Abstract

The utility model belongs to back fluid spool maintenance technique field, specially a kind of maintenance unit suitable for back fluid spool, it is very difficult to solve above-mentioned replacement back fluid spool inner seal rings work, and then the problem of increasing production cost, maintenance unit includes the upper half and lower half, it is sequentially coaxially equipped with first through hole and the second through-hole from top to bottom along axial direction in the upper half, along axial direction from top to bottom sequentially coaxially equipped with third through-hole and fourth hole in lower half, the upper half and lower half are threadedly engaged；The top of the upper half is radially provided with groove along the first through hole, and the groove close to the first through hole both ends is equipped with the through slot for placing bayonet lock.Cost is relatively low for the utility model, the torsion of screw thread rotation is cleverly changed into downward pressure, very light it can must extract bayonet lock, and then replace its internal sealing ring, the cost of the sealing ring is far below the cost of back fluid spool, therefore can save expense, reduces production cost, with very high utility model, it is worthy to be popularized.

Description

A kind of maintenance unit suitable for back fluid spool

Technical field

The utility model belongs to back fluid spool maintenance technique field, and specially a kind of maintenance suitable for back fluid spool fills It sets.

Background technique

ZZS5600/14/28 hydraulic support used in coal mine, structure such as Fig. 5 institute of the back fluid spool inside valve group Show, wherein back fluid spool includes valve piston and housing parts 1, and the valve piston includes piston head 2 and piston rod 3, the shell The upper end of component 1 has radially extended top cover, and the center of the top cover is equipped with the through-hole with 3 clearance fit of piston rod, the shell The lower end of 1 inner wall of component extends downwardly the flange 4 that outer diameter is less than 1 outer diameter of housing parts；The piston rod 3 of the valve piston is from institute It states and is stretched out inside housing parts 1, the housing parts 1 are set in outside the piston head 2 of the valve piston, the piston head 2 It sets up groove week, sealing ring 5, the inner wall of the outer rim of the sealing ring 5 and the housing parts 1 is combined in the groove Sealing cooperation, the piston rod 3 of the valve piston above the top cover of housing parts 1 are successively arranged with spring 6 and pad from bottom to up Piece 7, the end for stretching out the piston rod 3 of the gasket 7 are equipped with radial through-hole, are combined with bayonet lock 8, the bayonet lock in the through-hole 8 length, the outer diameter of gasket 7 are respectively less than the outer diameter of spring 6.In practical work process, lead to back liquid valve due to various reasons 50 points of sealing ring on the valve piston of core are easily damaged, to cause liquid leakage inside valve group, and column or the very heavy movement of passage are slow Slowly, and then normal production process is influenced.Since bayonet lock 8 is smaller, the extruding of spring 6, so close inside replacement back fluid spool The work of seal 5 is very difficult, and in previous maintenance process, check man is handled using replacement back fluid spool.But because It for liquid leakage caused by one of sealing ring 5, is just handled by the way of replacing back fluid spool, very waste accessory, this will cause very A big unnecessary expense, virtually increases production cost, is unfavorable for coal production operation.

Summary of the invention

Utility model aims to solve very difficult, the Jin Erzeng of above-mentioned replacement back fluid spool inner seal rings work The problem of having added production cost, provides a kind of maintenance unit suitable for back fluid spool.

The technical scheme in the invention for solving the technical problem is: a kind of maintenance unit suitable for back fluid spool includes The upper half and lower half are sequentially coaxially equipped with first through hole and the second through-hole along axial direction in the upper half from top to bottom, and the It is connected between one through-hole and the second through-hole, the outer wall gap of the piston rod of the inner wall and back fluid spool of the first through hole is matched It closes, the upper gap cooperation of the housing parts outer wall on the top and back fluid spool of second through-hole wall, the second through-hole wall Lower part be equipped with internal screw thread；It is sequentially coaxially equipped with third through-hole and fourth hole from top to bottom along axial direction in the lower half, and It is connected between third through-hole and fourth hole, the inner wall of the third through-hole and the underclearance of housing parts outer wall cooperate, The inner wall of the fourth hole and the outer wall clearance fit of housing parts lower end flange；The top of the lower half outer wall is equipped with outer Screw thread, the upper half and lower half are mutually fastened by external screw thread and internal screw thread；The top of the upper half is along described first Through-hole is radially provided with groove, and the groove close to the first through hole both ends is equipped with the through slot for placing bayonet lock.

The application method and working principle of a kind of maintenance unit suitable for back fluid spool described in the utility model: first will Back fluid spool is placed in the lower half, then closes the upper half, and the piston rod and bayonet lock are placed in the upper half In first through hole and its groove, by rotate the upper half, make the torsion of the screw thread rotation between the upper half and lower half become to Under pressure the spring of back fluid spool is pressed downward, then bayonet lock just loosens, to take out bayonet lock, valve piston is from housing section Part is deviate from, i.e., the sealing ring on replaceable valve piston；Circle replacement to be sealed carries out above-mentioned inverse operation after finishing again, can be light Install back fluid spool.

Preferably, be also coaxially provided with fifth hole in the upper half, the fifth hole be located at the first through hole with Between second through-hole, the inner wall of the fifth hole cooperates with the gapping of spring being set on the outside of piston rod.In top Adding fifth hole can make the inside of maintenance unit and back fluid spool more identical.

Preferably, the upper and lower part is made of nylon material.Cost is relatively low for nylon material, has good toughness, resistance to It is good to grind power strong, oil resistant, antidetonation, stretching, bending strength, and has the characteristics that water imbibition is small, good stability of the dimension.

The beneficial effects of the utility model are: cost is relatively low for the utility model, cleverly the torsion of screw thread rotation is changed For downward pressure, very light can must extract bayonet lock, by the utility model can very easily by back fluid spool open and more Its internal sealing ring is changed, the cost of the sealing ring is very low, well below the cost of back fluid spool, therefore can save expense, subtract Few spare parts consumption, reduces production cost, has very high utility model, is worthy to be popularized.

Detailed description of the invention

Fig. 1 is the overlooking structure diagram of the upper half described in the utility model.

Fig. 2 is the facing structure figure of the upper half described in the utility model.

Fig. 3 is the side block diagram of the upper half described in the utility model.

Fig. 4 is the structural schematic diagram of lower half described in the utility model.

Fig. 5 is the structure diagram (sectional view) of back fluid spool.

In figure: 1- housing parts；2- piston head；3- piston rod；4- flange；5- sealing ring；6- spring；7- gasket；8- card Pin；The upper half 9-；The lower half 10-；11- first through hole；The second through-hole of 12-；13- third through-hole；14- fourth hole；15- is recessed Slot；16- fifth hole；17- through slot.

Specific embodiment

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be practical to this Novel technical solution is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, Rather than whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness Obtained every other embodiment under the premise of labour, belongs to the range that the utility model is protected.

Referring to attached drawing 1 to 5, now a kind of maintenance unit suitable for back fluid spool provided by the utility model is said It is bright.

A kind of maintenance unit suitable for back fluid spool is as shown in Figure 1,2,3, 4, and the maintenance unit includes 9 He of the upper half Lower half 10, the upper half 9 is interior to be sequentially coaxially equipped with first through hole 11 and the second through-hole 12, and first along axial direction from top to bottom It is connected between through-hole 11 and the second through-hole 12, between the outer wall of the piston rod 3 of the inner wall and back fluid spool of the first through hole 11 Gap cooperation, the upper gap cooperation of 1 outer wall of housing parts on the top and back fluid spool of 12 inner wall of the second through-hole, second is logical The lower part of 12 inner wall of hole is equipped with internal screw thread；It is sequentially coaxially equipped with 13 He of third through-hole from top to bottom along axial direction in the lower half 10 Fourth hole 14, and be connected between third through-hole 13 and fourth hole 14, the inner wall and housing parts 1 of the third through-hole 13 The underclearance of outer wall cooperates, the inner wall of the fourth hole 14 and the outer wall clearance fit of 1 lower end flange 4 of housing parts；Institute The top for stating 10 outer wall of lower half is equipped with external screw thread, the upper half 9 and lower half 10 and is mutually detained by external screw thread and internal screw thread It closes；The top of the upper half 9 is radially provided with groove 15 along the first through hole 11, close to 11 both ends of first through hole Groove 15 is equipped with the through slot 17 for placing bayonet lock 8.

The application method and working principle of a kind of maintenance unit suitable for back fluid spool described in the utility model: first will 1 lower end flange 4 of housing parts of back fluid spool penetrates in fourth hole 14 and housing parts 1 are placed in third through-hole 13, makes It obtains back fluid spool to be placed in the lower half 10, then closes the upper half 9, the piston rod 3 and bayonet lock 8 respectively penetrate upper half The first through hole 11 and through slot 17 in portion 9, the stepped part stop bit that 6 upper end of spring is formed with first through hole 11 and the second through-hole 12 are matched It closes, by rotating the upper half 9, so that the torsion of the screw thread rotation between the upper half 9 and lower half 10 is become downward pressure will be returned The spring 6 of liquid spool is pressed downward, and then bayonet lock 8 pushes bayonet lock 8 by groove 15, bayonet lock 8 is sliding out of groove 15 with regard to loosening Out, to take out bayonet lock 8, valve piston is deviate from from housing parts 1, i.e., the sealing ring 5 on replaceable valve piston；Circle 5 to be sealed is more It changes after finishing and carries out above-mentioned inverse operation again, can easily install back fluid spool.

Further, as a kind of specific embodiment party of the maintenance unit suitable for back fluid spool described in the utility model Formula is also coaxially provided with fifth hole 16 as shown in Figure 1, Figure 2 and Figure 3 in the upper half 9, the fifth hole 16 is located at institute It states between first through hole 11 and second through-hole 12, the inner wall of the fifth hole 16 and the bullet for being set in 3 outside of piston rod 6 clearance fit of spring.Fifth hole 16 is added in the upper half 9 can make the inside of maintenance unit and back fluid spool more identical.

Further, as a kind of specific embodiment party of the maintenance unit suitable for back fluid spool described in the utility model Formula, the upper half 9 and lower half 10 are made of nylon material.Cost is relatively low for nylon rod, have good toughness, tear resistance it is strong, Oil resistant, antidetonation, stretching, bending strength are good, and have the characteristics that water imbibition is small, good stability of the dimension.

The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but the utility model is not limited to Above embodiment can also not depart from the utility model within the knowledge of a person skilled in the art It is made a variety of changes under the premise of objective.

Claims (3)

1. a kind of maintenance unit suitable for back fluid spool, it is characterised in that: the maintenance unit includes the upper half (9) and lower half Portion (10), the upper half (9) is interior to be sequentially coaxially equipped with first through hole (11) and the second through-hole (12) along axial direction from top to bottom, and It is connected between first through hole (11) and the second through-hole (12), the inner wall of the first through hole (11) and the piston rod of back fluid spool (3) outer wall clearance fit, the top of housing parts (1) outer wall on the top and back fluid spool of the second through-hole (12) inner wall The lower part of clearance fit, the second through-hole (12) inner wall is equipped with internal screw thread；In the lower half (10) from top to bottom successively along axial direction It is coaxially provided with third through-hole (13) and fourth hole (14), and is connected between third through-hole (13) and fourth hole (14), institute State third through-hole (13) inner wall and housing parts (1) outer wall underclearance cooperate, the inner wall of the fourth hole (14) with The outer wall clearance fit of housing parts (1) lower end flange (4)；The top of lower half (10) outer wall is equipped with external screw thread, described The upper half (9) and lower half (10) are mutually fastened by external screw thread and internal screw thread；The top of the upper half (9) is along described first Through-hole (11) is radially provided with groove (15), and the groove (15) close to the first through hole (11) both ends, which is equipped with, places bayonet lock (8) through slot (17).

2. a kind of maintenance unit suitable for back fluid spool according to claim 1, which is characterized in that the upper half (9) it is also coaxially provided with fifth hole (16) in, the fifth hole (16) is located at the first through hole (11) and leads to described second Between hole (12), the inner wall of the fifth hole (16) and spring (6) clearance fit being set on the outside of piston rod (3).

3. a kind of maintenance unit suitable for back fluid spool according to claim 2, which is characterized in that the upper half (9) it is made with lower half (10) of nylon material.